| 0 | Zero Transmission Level Point |
802.11 | Wireless LAN Standard | 911 | Emergency telephone number in North America | 1394 | Firewire Bus (IEEE 1394) | 6581 | SID sound chip | 8580 | SID sound chip | 100rel | SIP Provisional Message Reliability | 1080i | 1080 line 1920x1080 resolution interlaced | 1080p | 1080 line 1920x1080 resolution progressive | 10BaseT | 10-Mbps Baseband Ethernet | 10GFC | 10 Gigabit Fibre Channel | 16-QAM | Sixteen-State Quadrature Amplitude Modulation (QAM) | 1-ESS | x-ESS series of Electronic Switching Systems from AT&T/Lucent | 1x | Single Carrier | 1xEV-DO | Single Carrier (1x) Evolution Data Optimized or (1x) Evolution Data Only | 1xMC | 1x Multi-Carrier | 1xRTT | Single Carrier (1x) Radio Transmission Technology | 2.5G | Enhanced Data Services | 24p | 24fps progressive scan | 2W | Two Wire | 300-pin | Optical transmitters and receivers in a single package | 3DES | Triple Data Encryption Standard | 3G | Third Generation (Mobile Network) | 3GPP | Third Generation Partnership Project | 3GPP | Third-Generation Partnership Project | 3P | Predictive, Proactive, and Preventive Philosophy | 3WC | Three Way calling | 4GL | Fourth-Generation Language | 4W | Four Wire | 800 or 888 | Freephone | 802.16d-2004 | Fixed WiMAX | 0 | Mobile WiMAX | 802.x | Series of LAN standards developed by IEEE | AA | Authentication Assertion | AAA | Authentication, Authorization, and Accounting | AAC | Advanced Audio Coding | AAC-LC | Advanced Audio Coding - Low Complexity | AACS | Advanced Access Content System | AAC-SSR | Advanced Audio Coding - Scalable Sampling Rate | AAL | ATM Adaptation Layer | AAL1 | ATM Adaptation Layer One | AAL2 | ATM Adaptation Layer 2 | AAL3/4 | ATM Adaptation Layer 3/4 | AAL5 | ATM Adaptation Layer 5 | AAL-SDU | ATM Adaptation Layer Service Data Unit | AAR | Automatic Alternative Routing | AARP | AppleTalk Address Resolution Protocol | AAUI | Apple Attachment-Unit Interface | AAV | Alternative Access Vendor | AAVS | Adaptive Audio-Visual Session | ABM | Antenna Bus Master | ABR | Available Bit Rate | ABR | Available Bit Rate | AC | Access Concentrator | AC | Access Control, or Alternating Current, or Authentication Center (also AUC) | AC-1 | Active Coding - 1 | AC-2 | Active Coding - 2 | AC-3 | Audio Coding - 3 | ACD | Automatic Call Distribution | ACD | Automatic Call Distributor | ACDF | Access Control Decision Function | ACE | Advanced Coding Efficiency | ACE | Authentication Encryption | ACEF | Access Control Enforcement Function | ACEK | Authentication Encryption Key | ACELP | Algebraic Code Excited Linear Prediction | ACI | Access Control Information | ACIA | Asynchronous Communication Interface Adapter | ACK | Acknowledgement | ACK | Acknowledgement | ACL | Access Control List | ACM | Address Complete Message | ACN | Advisory Committee on Networking | ACOL | Asynchronous COLlaboration | ACP | Access Control Policy point | ACP | Access Control Point | ACPA | Audio Capture and Playback Adapter | ACR | Allowed Cell Rate | ACRE | Authorization and Call Routing Equipment | ACS | ATM Circuit Steering | ACTLU | ACTivate Logical Unit | ACTPU | Activate Physical Unit | ACTS | Advanced Communications Technology Satellite | AD | Administrative Domain | ADA | Authorization Decision Assertion | ADC | ADC Telecommunications | ADCCP | Advanced Data Communications Control Protocol | ADM | Asynchronous Disconnect Mode | ADM | Add-Drop Multiplexer (SDH Element) | ADMD | ADministration Management Domain | ADN | Advanced Digital Network | ADPCM | Adaptive Differential Pulse Code Modulation | ADPCM | Adaptive Differential Pulse Code Modulation | ADR | Advanced Digital Recording | ADSI | Analog Display Services Interface | ADSL | Asymmetric Digital Subscriber Line | ADSL | Asymmetric Digital Subscriber Line | ADTF | ACR Decrease Time Factor | AEC | Acoustic Echo Cancellation | AES | Advanced Encryption Standard | AES3 | Audio Engineering Society digital audio standard | AFCEA | Armed Forces Communications and Electronics Association | AFI | Authority and Format Identifier | AFLT | Advanced Forward Link Trilateration | AFNOR | Association Francaise de Normalisation | AFS | Andrew File System | AG | Administrative Gateway | AGC | Automatic Gain Control | AGOCG | Advisory Group on Computer Graphics | A-GPS | Assisted GPS | AGRAS | Air-Ground Radiotelephone Automated Service | AH | Authentication Header | AHFG | ATM-attached Host Functional Group | AIM | AOL Instant Messenger | AIMUX | ATM Inverse Multiplexing | AIN | Advanced Intelligent Network | AIN | Advanced Intelligent Network (ANSI IN Standard) | AIOD | Automatic Identification of Outward Dialed calls | AIS | Alarm Indication Signal Defect | AIX | Advanced Interactive eXecutor | A-key | Authentication key | AL | Access Unit Layer | AL or SL | Adaptation Layer or Sync Layer | ALG | Application Level Gateway | ALI | Automatic Location Information | ALP | ATM LAN Pilot | AL-PDU | Access Unit Layer Protocol Data Unit | ALTQ | ALTernate Queuing | ALU | Arithmetic and Logic Unit | AM | Amplitude Modulation | AMD | Advanced Micro Devices | AMI | Alternate Mark Inversion | AMO | ATM Management Objects | AMPS | Advanced Mobile Phone Service | AMPS | Advanced Mobile Phone System | AMR | Adaptive Multi-Rate | ANI | Automatic Number Identification | ANI | Automatic Number Identification | ANS | Automatic Noise Suppression | ANS | Advanced Network Services | ANSI | American National Standards Institute | ANSI | American National Standards Institute | ANSI-41 | ANSI standard for mobile management (ANSI/TIA/EIA-41) | ANT | ADSL Network Terminator | AOA | Angle of Arrival | AOD | Approved Output Domain | AOL | America On Line (ISP) | AOS | Alternative Operator Services | AP | Asserting Party | APCM | Adaptive Pulse Code Modulation | APDU | Application Protocol Data Unit | API | Application Programming Interface | APL | Average Picture Level | APNIC | Asia Pacific Network Information Center | APON | ATM Passive Optical Network | APP | APPlication | APPC | Advanced Program-to Program Communications (IBM SNA) | APPN | Advanced Peer-to-Peer Network (IBM SNA) | Appt | Appointment | APS | Al-Packetized Stream | AQM | Attribute Query Message | AR | Acoustic Research | ARC | ATM Research Consortium | ARCnet | Attached Resource Computer Network (Datapoint) | ARDIS | Advanced Radio Data Information Service | ARIN | American Registry for Internet Numbers | ARJ | Admissions ReJect message | ARM | Attribute Response Message | ARP | Address Resolution Protocol | ARP | Address Resolution Protocol | ARPA | Advanced Research Projects Agency | ARPA | Advanced Research Projects Agency | ARPANET | Advanced Research Projects Agency NETwork | ARPANET | ARPA Network | ARPU | Average Revenue Per User | ARQ | Automatic Repeat Request | ARS | Automatic Route Selection | ARSP | Advanced Real Time Simple Profile | AS | Autonomous System | ASC | Advanced Simulation and Computing | ASCII | American Standard Code for Information Interchange | ASCII | American Standard Code for Information Interchange | ASF | Advanced Streaming Format | ASIC | Application-Specific Integrated Circuit | ASM | Any Source Multicast | ASN | Autonomous System Number | ASN.1 | Abstract Syntax Notation One | ASN.1 | Abstract Syntax Notation 1 (ISO) | ASN.X | Abstract Syntax Notation X | ASP | Application Service Provider | ASR | Advanced Symmetric Replication | ASR | Automatic Send Receive, Automatic Speech Recognition | ASS | Auxiliary Service Station | AST | Advanced Screen Telephony | ASTA | Advanced Software Technology and Algorithms | ASTM | American Society for Testing Materials | AT&T | American Telephone & Telegraph | ATC | ATM Transfer Capability | ATCA | Advanced Telecom Computing Architecture | ATDM | Asynchronous Time Division Multiplexing | ATIS | Alliance for Telecommunications Industry Solutions (formerly ECSA) | ATLAS | Automatically Tuned Linear Algebra Software | ATM | Asynchronous Transfer Mode | ATM | Asynchronous Transfer Mode, Automatic Teller Machine | ATM25 | Asynchronous Transfer Mode 25 | ATMARP | ATM Address Resolution Protocol | ATSC | Advanced Television Systems Committee | ATSC | Advanced Television Systems Committee | ATU-C | ADSL Transmission Unit - Central | ATU-R | ADSL Transmission Unit - Remote | ATVA | Analog Television Adapter | AU | Access Unit | AUI | Attachment User Interface | AUI | Attachment Unit Interface | AUP | Acceptable Use Policy | AV | Audio Visual or Audio Video | AV Scene | AudioVisual Scene | Avatar | on-the-screen representation of a real person | AVC | Advanced Video Coding | AvCR | Available Cell Rate | AVI | Audio Video Interleaved | AVK | Audio Video Kernel | AVL tree | G.M. Adelson-Velsky and E.M. Landis tree | AVO | Audio Visual Object | AVSS | Audio-Video Support System | AW | Administrative Weight | AWG | American Wire Gauge | AWG | American Wire Gauge | AXE 10 | Series of electronic telephone exchanges from L.M. Ericsson | B2B | Business to Business | B2B | Business-to-Business | B2C | Business to Consumer | B2C | Business-to-Consumer | B8ZS | Bipolar with eight zero substitution | B8ZS | Binary Eight Zero Substitution | BAC | Broadband assurance contact | BACP | Bandwidth Allocation Control Protocol | BACP | Bandwidth Allocation Control Protocol | BACR | Billing Account Cross Reference | BAD | Broadband assurance diagnostics | BAIC | Barring of All Incoming Calls | BAN | Billing Account Number | BAP | Body Animation Parameters | BAPI | Biometric Application Programming Interface | BAR | Billing Account Reference | BASIC | Beginner's All-purpose Symbolic Instruction Code | BASS | Business and Application Support System | BB | Broadband | BBC | Broadband Bearer Capability | BBFM | Broadband fault management | BBIP | Broadband ip service identifer | BBNTE | Broadband network terminating equipment | BBS | Bulletin Board System | BBS | Bulletin Board System | BCC | Block Check Character | BCD | Binary Coded Decimal | BCG | Building Communications Gateway | BCH code | Bose, Ray-Chaudhuri, Hocquenghem code | BCR | Building Communications Room | BD | Blu-ray Disc | BDC | Backup Domain Controller | BDCS | Broadband Digital Cross-Connect System | BDSL | Broadband Digital Subscriber Line | Bellcore | Bell Communications Research, Inc. (Now Telcordia) | BEP | Back-End Processor | BER | Basic Encoding Rules | BER | Bit Error Rate | BERR | Backward ERRor | BERT | Bit Error Rate Test (or Tester) | BETRS | Basic Exchange Telecommunications Radio Service | BFS | Broadcast File System | BGCF | Breakout Gateway Control Function | BGF | Border Gateway Function | BGP | Border Gateway Protocol | BHCA | Busy Hour Call Attempt | BHSA | Busy Hour Session Attempts | BIB | Backward Indicator Bit | BiCMOS | Bi-polar Complementary Metal Oxide on Silicon | BIFS | BInary Format for Scenes | BIOS | Basic Input/Output System | BIOS | Basic Input-Output System | BIP | Billing Interconnection Percentage | BISDN | Broadband Integrated Services Digital Network | B-ISDN | Broadband ISDN | BISYNC | Binary Synchronous Communications | BLACS | Basic Linear Algebra Communication Subprograms | BLAS | Basic Linear Algebra Subprograms | BLOB | Binary Large OBject | BLOWFISH | Symmetric Block Cipher | BMC | Billing Media Converter | BOC | Bell Operating Company | BOC | Bell Operating Company (USA) | BOCR | Bidirectional OpenCable Receiver | BONDING | Bandwidth On Demand Interoperability Group | BOS | Billing Output Specification | BOU | Broadband operations unit | B-Picture | Bidirectionally-coded Picture | BPL | Broadband over Power Lines | BPON | Broadband Passive Optical Networking | BPS | Broadband provision system | bps | bits per second | BREW | Binary Runtime Environment for Wireless | BRI | Basic Rate Interface | BRI | Basic Rate Interface (ISDN) | BS | Base Station | BSAM | Basic Sequential Access Method | BSC | Binary Synchronous Communications | BSC | Base Station Controller, or Binary Synchronous Communications (IBM) | BSE | Basic Service Element | BSN | Backward Sequence Number | BSS | Base Station Sub-system (GSM) | BT MSP | Bt multi service platform | BTAM | Basic Telecommunications Access Method | BTS | Base Transceiver Station | BTV | Business Television | BTWP | Bt wholesale portal | BWA | Broadband wireless access | C64 | Commodore 64 | CA | Certification Authority | CAB | Cabinet - cross connection point between exch & eu | CableCARD | Cable Point of Deployment module | CAC | Connection Admission Control | CAD | Computer-Aided Design | CADS | Composite Adaptive Directory Services | CAL | Customer access link | CALEA | Communications Assistance for Law Enforcement Act | CAM | Carrierless Amplitude Modulation | CAM | Computer-Aided Manufacturing | CAMA | Centralized Automatic Message Accounting | CAMEL | Customized Applications for Mobile-network Enhanced Logic (GSM/ETSI) | CAMSS | Computer assisted maintenance of special services | CAN | Campus Area Network | CANARIE | Canadian Network for Advancement of Research, Industry, Education | Canoe | Cable Access Network Operations Extensions | CAP | Carrierless Amplitude/Phase | CAP | Competitive Access Provider | CAPS | Common ISDN API Service | CARS | Cable Antenna Relay Service | CARS | Cable Antenna Relay Services | CAS | Channel Associated Signaling | CASE | Computer-Aided Software Engineering | CAT | Customer acceptance testing | CAT5 | Category 5 cable | CATV | Community Antenna TeleVision | CATV | Cable Television or Community Antenna Television | CAVE | Cellular Authentication and Voice Encryption | CB | Citizens Band | CBC | Cipher Block Chaining | CBR | Constant bit rate | CBR | Constant Bit Rate | CBT | Core Based Trees | CC | Country Code | CCBS | Completion of Call to Busy Subscriber | CCC | Clear Channel Capability | CCCH | Common Control Channel | CCD | Charge Coupled Device | CCD | Charge Coupled Device | CCH | Connections per Circuit Hour | CCI | Co-Channel Interference | CCIR | Comit | CCITT | Comit | CCR | Central Communications Room | CCR | Customer Controlled Reconfiguration | CCS | Centi Call Seconds | CCS | Common Channel Signaling | CCSS6 | Common Channel Signaling System # 6 | CCSS7 | Common Channel Signaling System 7 | CCT | Continuity Check Transceiver | CD | Carrier Detect | CDB | Call Detail Block | CDE | Call Detail Element | CDMA | Code Division Multiple Access | CDN | Content Delivery Networks | CDO | Community Dial Office | CDPD | Cellular Digital Packet Data | CDR | Call Detail Reporting | CDR | Call Detail Record | CD-R | Compact Disk-Recordable | CD-ROM | Compact Disk-Read-Only Memory | CDS | Cell Directory Services | CE | Core Experiment | CED | Caller-Entered Digits | CELP | Code Excited Linear Prediction | CENTREX | Central Office Exchange (PBX-like Service) | CEPT | Conference of European Posts and Telecommunications | CEPT | Conference of European Posts and Telecommunications | CERN | Centre Europ | CFB | Call Forwarding Busy | CFNR | Call Forward No Reply | CFU | Call Forward Unconditional | CGSA | Cellular Geographic Service Areas | CHILA | CableCARD Host Interface Licensing Agreement | CIC | Carrier Identification Code | CIDR | Classless Inter-Domain Routing | CIP | Channel Interface Processor | CIR | Committed Information Rate | CIR | Committed Information Rate | CISE | Computing and Information Science and Engineering | CLASS | Custom Local Area Signaling Service | CLASS | Custom Local Area Signaling Services | CLEC | Competitive Local Exchange Carrier | CLEC | Competitive Local Exchange Carrier | CLI | Calling Line Identification | CLID | Calling Line IDentification | C-link | Cross Link | CLIP | CLassic IP over atm | CLLI | Common Language Location Identification code | CLNP | ConnectionLess Network Protocol | CM | Communications Module | CMA | Communications Management Association | CMC | Customer management centre | CMCU | Communications Module Control Unit | CMI | Coded Mark Inversion | CMIP | Common Management Information Protocol (ISO) | CMIS | Common Management Information Services (ISO) | CMISE | Common Management Information Service Element (ISO) | CMOS | Complementary Metal Oxide Semiconductors | CMRS | Commercial Mobile Radio Service | CMTS | Cable Modem Termination System | CND | Calling Number Delivery | CNET | Centre National d' | CNI | Calling Number Identification | CNM | Customer Network Management | CO | Central Office | CO | Central Office | Codec | Coder/decoder | CON | Concentrators (In FDDI) | CON | Concentrator | CONUS | CONtiguous United States | COO | Cell of Origin | CORBA | Common Object Request Broker Architecture (OMG) | COT | Central Office Terminal | COT | Central Office Terminal | COTS | Commercial Off-The-Shelf | CP | Control Point | CPC | Calling Party Category | cPCI | Compact Peripheral Component Interconnect | CPE | Customer Premises Equipment | CPE | Customer Premises Equipment | CPG | Call ProGress | CPGPS | Congestion-aware Packet Generalized Processor Sharing | CPM | Cost Per Mille (or Thousand) | CPN | Cisco Powered Network (Ingredient Band) | CPNI | Customer Proprietary Network Information | CPP | Calling Party Pay | CPS | Cycles per second (Hertz) | CPU | Central Processing Unit | CRC | Cyclic redundancy check | CRC | Cyclic Redundancy Check | CRF | Customer requirement form | CRM | Customer Relationship Management | CRMF | Certificate Request Message Format | CRV | Call Reference Value | CRYPTOCard | Identity Authentication software | CSA | Carrier Serving Area | CSA | Carrier Servicing Area | CSCF | Call Session Control Function | CSE | Customer service engineer | CSI | Calling Station Identification | CSL | Component SubLayer | CSM | Communications Services Management | CSMA/CD | Carrier Sense Multiple Access with Collision Detection | CSP | Configurable Security Processor | CSR | Customer Service Representative | CSS | Controlled Slip Seconds | CSU | Channel Service Unit | CSU | Channel Service Unit | CSU/DSU | Channel Service Unit/Data Service Unit | CT | Call Transfer | CT | Cordless Telecommunications | CTI | Computer Telephony Integration | CTI | Computer Telephony Integration | CTIA | Cellular Telecommunications Industry Association | CTP | Composite Theoretical Performance | CTS | Clear To Send | Cu | Copper Local Loop | CUD | Customer usage billing | CUG | Closed User Groups | CW | Call Waiting | CWWC | Confirmed working with customer | D | Descriptor | DA | Destination Address | DA | Destination Address | DAA | Distributed Application Architecture | DAB | Digital Audio Broadcast | DAC | Digital-to-Analog Converter | DACL | Discretionary Access Control List | DACS | Digital Access and Cross-connect System | DAI | DMIF Application Interface | DAL | Dedicated Advertiser Location | DAMA | Demand Assigned Multiple Access | D-AMPS | Digital Advanced Mobile Phone Service | D-AMPS | Digital Advanced Mobile Phone Service | DAP | Demand Access Protocol | DARPA | Defense Advanced Research Projects Agency | DARPA | Defense Advanced Research Projects Agency | DAS | Distributed Antenna System | DAT | Digital Audio Tape | DATU | Direct Access Test Unit | DAVIC | Digital Audio Visual Council | DB | Decoder Buffer | dB | deciBel | DBM | Dial Backup Module | DBMS | Database Management System | DBS | Direct Broadcast Satellite | DCAS | Downloadable Conditional Access System | DCB | Digital Channel Bank | DCE | Data Communications Equipment | DCE | Data Communications Equipment, or Distributed Computing Environment | DCN | Dropped connection | DCP | Data Classification Policies | DCS | Digital Cross-Connect System | DCT | Discrete Cosine Transform | DCT1000 | Digital Consumer Terminal 1000 | DCU | Distribution and Control Unit | DDD | Direct Distance Dialing | DDDS | Dynamic Delegation Discovery System | DDI | DMIF-to-DMIF Interface | DDL | Description Definition Language | DDN | Dedicated Digital Network | DDS | Digital Data Service | DDS | Dataphone Digital Service | DECT | Digital Enhanced Cordless Telecommunications | DECT | Digital Enhanced (formerly, European) Cordless Telecommunication | DeMux | Demultiplexer | DER | Distinguished Encoding Rules | DES | Data Encryption Standard | DES | Data Encryption Standard | DH | Diffie-Hellman algorithm | DHCP | Dynamic Host Configuration Protocol | DIBA | DOCSIS IPTV Bypass Architecture | DID | Digital Item Declaration | DLC | Digital Loop Carrier | DLCI | Data Link Connection Identifier | DLCS | Digital Loop Carrier System | DLL | Dynamic Link Library | DLL | Dynamic Link Library | DLNA | Digital Living Network Alliance | DLP | Digital Light Projection | DLU | Digital Line Unit | DM | Distributed Management | DMAC | Dual Media Access Control (For FDDI) | DME | Distributed Management Environment (OSF) | DMI | Distributed Management Interface | DMIF | Delivery Multimedia Integration Framework | DMP | Digital Media Player | DMS | Digital Multiplex Switch (Nortel Networks Switching Product Family DMS 100, 200, | DMT | Discrete mutli-tone (usb modem) | DMT | Discrete Multitone | DMTF | Desktop Management Task Force | DN | Directory number | DNA | Digital Network Architecture (Digital Equipment Corporation) | DNIe | Digital Natural Image engine | DNS | Domain Name System | DNS | Domain Name Service DoD Department of Defense (USA) | DoCoMo | Do Communications Over the MObile network | DOCSIS | Data Over Cable Service Interface Specification | DOI | Digital Object Identifier | DOS | Disk Operating System | DOV | Data Over Voice | DOWNSTREAM | Data transported from the customer to end user | DP | Distribution point | DPCM | Differential Pulse Code Modulator | DRAM | Dynamic Random Access Memory | DRCS | Digital Radio Concentrator Systems | DRE | Dynamic Range Expander | DS | Description Schemes | DS | Digital Service, Digital Signal | DS-0 | Digital Signal, Level 0 (64 kbps) | DS-1 | Digital Signal, Level 1 (1.544 Mbps) | DS-1C | Digital Signal, Level 1C (3.152 Mbps) | DS-2 | Digital Signal, Level 2 (6.312 Mbps) | DS-3 | Digital Signal, Level 3 (44.736 Mbps) | DS-4 | Digital Signal, Level 4 (274.176 Mbps) | DSI | Digital Speech Interpolation | D-SIDE | Line - dp side of cabinet | DSL | Digital Subscriber Line | DSL | Digital Subscriber Line | DSLAM | Digital Subscriber Line Access Multiplexer | DSM-CC | Digital Storage Media Command and Control | DSP | Digital Signal Processor | DSP | Digital Signal Processor | DSS | Digital Signature Standard | DSS | Decision Support System | DSU | Data Service Unit | DSU | Digital Service Unit | DTAM | Document Transfer and Manipulation (ISO) | DTCP-IP | Digital Transmission Content Protection/Internet Protocol | DTE | Data Terminal Equipment | DTE | Data Terminal Equipment | DTLA | Digital Transmission Licensing Administrator | DTMF | Dual-Tone MultiFrequency | DTU | Data Transfer Unit | DTV | Digital Television | DVB | Digital Video Broadcast | DVB | Digital Video Broadcasting | DVB-H | Digital Video Broadcasting - Handheld | DVB-T | Digital Video Broadcasting - Terrestrial | DVD-A | Digital Versatile Disc-Audio | DVI | Digital Visual Interface | DVMRP | Distance Vector Multicast Routing Protocol | DVS | Descriptive Video Service | DWDM | Dense Wavelength Division Multiplexing | DXI | Data Exchange Interface | E&M | Ear and Mouth, or recEive and transMit (signaling) | E2E | End-to-End | E-911 | Enhanced emergency telephone number (USA) | EAI | Enterprise Application Integration | EAP | Extensible Authentication Protocol | EBAF | Extended Bellcore AMA Format | EBCDIC | Extended Binary Coded Decimal Interchange Code (IBM) | EBIF | Etv Binary Interchange Format | EC | European Community | ECB | Electronic CodeBook | ECFS | Electronic Comment Filing System | ECMA | European Community Manufacturers Association | ECSA | Exchange Carrier Standards Association (now ATIS) | EDA | Electronic Design Automation | EDGE | Enhanced Data rates for Global Evolution | EDGE | Enhanced Data for GSM Evolution | EDI | Electronic Data Interchange | EE | Execution Engine | EEROM | Electronically Erasable Read-Only Memory | EF&I | Engineering, Furnishing and Installation | EFT | Electronic Funds Transfer | EHCI | Enhanced Host Controller Interface | EHDR | Extended HeaDeR | EHF | Extremely High Frequency (more than 30 GHz) | EIA | Electronic Industries Association | EIR | Equipment Identity Register | EISA | Extended Industry Standard Architecture | ELF | Early life failure | EM | Emergency maintenance | EMEA | Europe, Middle East & Africa (Business Region) | EML/EMS | Element Management Layer/ Element Management Service | EMPP | Enhanced MASE Profile Paradigm | EMS | Enhanced Messaging Services | ENS | Enhanced Network Services | ENUM | Electronic NUMbering | EOT | End of Transmission | EPAL | Enterprise Privacy Authorization Language | EPI | External Provisioning Interface | EPIC | Electronic Privacy Information Center | EPON | Ethernet Passive Optical Networking | ERMES | European Radio Message System (standard for pagers) | ERP | Enterprise Resource Management | ESCON | Enterprise System Connection (IBM) | E-SIDE | Line - exchange side of cabinet | ESME | Emergency Service Message Entity | ESMR | Enhanced Specialized Mobile Radio | ESNE | Emergency Service Network Entity | E-TDMA | Expanded Time Division Multiple Access | ETSI | European Telecommunications Standard Institute | EU | End user | EU | European Union | EUDAL | End user digital access link | EUDP | End user data path | EY-NPMA | Elimination-Yield Non-Preemptive Multiple Access | FAND | Free and Non Discriminatory | FASB | Financial Accounting Standards Board (USA) | FAT | File Allocation Table | FC | Frame Control, or Fiber Channel | FCAPS | Fault, Configuration, Accounts, Performance, Security (ISO) | FCC | Federal Communications Commission (USA) | FCS | Frame Check Sequence | FDD | Frequency Division Duplex | FDDI | Fiber Distributed Data Interface | FDDI-2 | Fiber Distributed Data Interface 2 | FDH | Fiber Distribution Hub | FDIC | Federal Deposit Insurance Corporation (USA) | FDMMA | Frequency Division Multiplexing Multiple Access | FDT | Fiber Distribution Terminal | FEP | Front-End Processor | FERR | Forward ERRor | FFT | Fast Fourier transform | FFTW | Fastest Fourier Transform in the West | FHSS | Frequency Hopping Spread Spectrum | FIFO | First-In First-Out | FITL | Fiber In The Loop | FM | Frequency Modulation | FMC | Fixed-Mobile Convergence | FMO | Field maintenance officer | FMS | Fraud Management System | FNF | Fault not found | FO | Fiber Optic | FOA | First office application | FOCIS | Forum for OpenCable Interactive Services | FOD | Fax on Demand | FOMA | Freedom of Mobile Multimedia Access | FOOTPRINT | Defined geographical area/group of postcodes | FOU | Field operations unit | FR | Frame relay | FR | Frame Relay | FRAD | Frame Relay Access Device, or Assembler/ Disassembler | FRC | Failed reconfigeration | FRS | Family Radio Service | FSAN | Full Service Access Network | FSK | Frequency-Shift Keying | FSS | Fixed Satellite System | FT1 | Fractional T1 | FTAM | File Transfer, Access, and Manipulation (ISO) | FTF | Faultsman test facility | FTP | File Transfer Protocol (TCP/IP) | FTS | Federal Telecommunications System | FTTB | Fiber To The Building | FTTC | Fiber To The Curb | FTTH | Fiber To The Home | FTTK | Fibre To The Kerb | FWA | Fixed Wireless Access | G.711 | Pulse Code Modulation | G.723 | Audio Compression Protocol | G.726 | ADPCM wave form codec | GA | General Audio | GAN | Global Area Network | GASS | Global Access to Secondary Storage | GATT | General Agreement on Tariffs and Trade | Gb | gigabit | GDS | Generic Digital Services | GEM | Generic Framing Method | GEO | Geostationary-Earth-Orbit | GGF | Global Grid Forum | GHz | gigaHertz (billions of cycles per second) | GIS | Geographic Information System | GMRS | General Mobile Radio Service | GOSIP | Government Open Systems Interconnection Profile (USA) | GPA | Global Presence Architecture | GPMS | Generic problem management system | GPON | Gigabit Passive Optical Networking | GPRS | General Packet Radio Service | GPS | Global Positioning System | GRAM | Grid Resource Allocation Management | GRX | GPRS Roaming Exchange | GSA | Gaming Standards Association | GSA | General Services Administration (USA) | GSD | Guaranteed Service Domain | GSEP | Generalized Symmetric Definite Eigenproblems | GSI | Grid Security Infrastructure | GSM | Global System for Mobile communications | GSM | Global System for Mobile telecommunications, or Groupe Sp | GSTN | General Switched Telephone Network | GUI | Graphical User Interface | GUP | Generic User Profile | GVPN | Global Virtual Private Network | H.323 | ITU standard for multimedia and videoconferencing | H0 | High-capacity ISDN channel operating at 384 kbps | H11 | High-capacity ISDN channel operating at 1.536 Mbps | H323 | ANSI standard for format over IP | HANA | High-Definition Audio-Video Network Alliance | HAVi | Home Audio Video Interoperability | HCR | Huffman Codeword Reordering | HCS | Header Check Sequence | HCT | Home Communications Terminal | HDAL | Host digital access link | HDB3 | High Density Bipolar 3 | HDCP | High-bandwidth Digital Content Protection | HDDS | Home Domain Discovery Service | HDLC | High-Level Data Link Control | HDLC | High-level Data Link Control (ISO) | HDMI | High-Definition Multimedia Interface | HDSL | High-Bit-Rate Digital Subscriber Line | HDSL | High-bit-rate Digital Subscriber Line | HDT | Host Digital Terminal | HDTV | High Definition Television | HDTV | High-Definition Television | HEC | Header Error Control | HECRTF | High End Computing Revitalization Task Force | HEP | Header Extension Processing | HEX | Hexadecimal | HF | High Frequency (3 MHz to 30 MHz) | HFC | Hybrid Fiber-Coaxial | HFC | Hybrid Fiber/Coax | HGR | Home gateway router | Hi8 | High-band 8mm video system | HIC | Head-end Interface Converter | HIF | Host InterFace | HiPERLAN | High PErformance Radio Local Area Network | HIPERLAN1 | High PErformance Radio Local Area Network One | HIPERLAN2 | High PErformance Radio Local Area Network Two | HISU | Home Integrated Service Unit | HITS | Headend In The Sky | HLR | Home Location Register | HLR | Home Location Register | HMI | Human-Machine Interface | HomePNA | Home Phoneline Networking Alliance | HPC | High-Performance Computing | HPCC | High Performance Computing and Communications | HPCCI | High Performance Computing and Communications Initiative | HPPI | High-Performance Parallel Interface | HSDPA | High Speed Downlink Packet Access | HSRP | Hot Standby Router Protocol | HSS | Home Subscriber Server | HTML | HyperText Markup Language | HTML 4 | HyperText Markup Language 4 | HTSUS | Harmonized Tariff Schedule of the United States | HTTP | Hyper-Text Transfer Protocol | HTTP | HyperText Transfer Protocol | HVAC | Heating, Ventilation, and Air Conditioning | Hz | Hertz (cycles per second) | I/F | Interface | I/O | Input Output | I/O | Input/Output | I/O | Input/Output | I/S-VOP | Intra/Sprite Video Object Plane | IA5 | International Alpha Set No. 5 | IAB | Internet Architecture Board | IAB | Internet Architecture Board | IABM | International Association of Broadcasting Manufacturers | IAC | Install And Commission | IAD | Integrated Access Device | IAM | Identity and Access Management | IANA | Internet Assigned Number Authority | IANA | Internet Assigned Numbers Authority | IBC | International Broadcasting Convention | IBDS | Interactive Broadband Delivery System | IC | Integrated Circuit | ICANN | Internet Corporation for Assigned Names and Numbers | ICCF | Industry Carriers Compatibility Forum | ICD | International Code Designator | ICI | Interexchange Carrier Interface | ICMP | Internet Control Message Protocol | ICMP | Internet Control Message Protocol | ICN | Iowa Communications Network | ICP | Integrated Communications Provider | ICR | Intelligent Call Routing | ICS | Intelligent Calling System ID Identification | ICT | In Circuit Test | ICW | Interrupted Continuous Wave | ID | Identifier | IDC | Insulation Displacement Connection | IDCT | Inverse Discrete Cosine Transform | IDDD | International Direct Dialing Designator | IDE | Integrated Drive Electronics | IDEA | International Data Encryption Algorithm | iDEN | integrated Digital Enhanced Network | iDEN | integrated Dispatch Enhanced Network | IDI | Initial Domain Identifier | IDL | Interface Definition Language | IDM | Identity Management | IDN | International Data Number | IDP | Initial Domain Part | IDPR | Interdomain Policy Routing | IDRP | Inter-Domain Routing Protocol | IDSL | ISDN Digital Subscriber Line | IDWT | Inverse Discrete Wavelet Transform | IE | Information Element | IEC | International Electrotechnical Commission | IEC | International Electrotechnical Commission, or InterExchange Carrier | IEEE | Institute of Electrical and Electronics Engineers | IEEE | Institute of Electrical and Electronics Engineers | IEEE 802.3 | IEEE LAN Protocol | IESG | Internet Engineering Steering Group | IESG | Internet Engineering Steering Group | IETF | Internet Engineering Task Force | IETF | Internet Engineering Task Force | IF | Intermediate Frequency | IFIP | International Federation of Information Processing | IFSS | Inverse Frequency Selective Switch | IGMP | Internet Group Management Protocol | IGRP | Interior Gateway Routing Protocol | IILC | Information Industry Liaison Committee | IIN | Issuer Identification Number | IITA | Information Infrastructure Technology and Applications | ILD | Injection Laser Diode | ILEC | Incumbent Local Exchange Carrier | ILEC | Incumbent Local Exchange Carrier | ILMI | Interim Local Management Interface | IM | Instant Messaging | IMAP | Internet Mail Access Protocol (IETF) | IMCC | Independent Multi-Family Communications Council | IMD | Inter-Modulation Distortion | IMDCT | Inverse Modified Discrete Cosine Transform | IMEI | International Mobile Equipment Identity | IMN | Intelligent Mobile Network | IMO | International Maritime Organization | IMP | Interface Message Processor | IMS | IP Multimedia Subsystem | IMSI | International Mobile Subscriber Identity | IMT-2000 | International Mobile Telecommunications 2000 (ITU) | IN | Intelligent Network | IN7 | Compaq SS7 stack (previously DECss7) | INAP | Intelligent Network Application Part (IN) | InATMARP | Inverse ATM Address Resolution Protocol | INC | Industry Numbering Committee | INMS | Integrated Network Management Services | INMS | Integrated Network Management System | INOC | Internet Network Operations Center | InP HEMT | Indium Phosphide High Electron Mobility Transistor | INTELSAT | International Telecommunications Satellite | INTELSAT | International Telecommunications Satellite Organization | IOC | Internet operations centre | IOC | InterOffice Channel | IOD | Initial Object Descriptor | IOPS | Internet Operators' Providers Services | IP | Internet Protocol | IP | Intelectual Property | IP VPN | Internet protocol virtual private network | IPA | Internet Protocol Address | IPC | Interprocess communications | IPDC | Internet Protocol Device Control | IPG | Interior Gateway Protocol | IPI | Intellectual Property Identification | I-Picture | Intra-coded Picture | IPMP | Intellectual Property Management and Protection | IPN | Intelligent Peripheral Node | IPO | Initial Public Offering | IPoATM | Internet Protocol over ATM | IP-PSTN | Internet Protocol Public Switched Telephone Network | IPPV | Impulse Pay Per View | IPR | Intellectual Property Rights | IPR | Intellectual Property Rights | IPSEC | Internet Protocol Security | IPSO | IP Security Option | IPTV | Internet Protocol TeleVision | IPv4 | Internet Protocol Version four (4 octets x.x.x.x) | IPv6 | Internet Protocol Version Six | IP-VPN | Internet Protocol Virtual Private Network | IPX | Internetwork Packet Exchange | IPX | Internetwork Packet Exchange | IRC | Incrementally Related Carrier | IRC | International Record Carrier | IRD | Integrated Receiver-Decoder | IrDA | Infrared Data Association | IrLAN | Infrared LAN | IrLAP | Infrared Link Access Protocol | IRN | Intermediate Routing Node | IRQ | Interrupt Request | IRR | Internal Rate of Return (Financial Modelling) | IRT | Integrated Receiver Transcoder | IRTF | Internet Research Task Force | IS | Intermediate System | IS | Information System, or Interim Standard (TIA/EIA) | IS-41 | TIA/EIA Interim Standard for mobile management | ISA | Interactive Services Association | ISA | Industry Standard Architecture | ISC | International Switching Center | ISDB-T | Integrated Services Digital Broadcasting - Terrestrial | ISDN | Integrated services digital network | ISDN | Integrated Services Digital Network | ISI | Inter-Symbol Interference | IS-IS | Intermediate System-to-Intermediate System | ISM | Industrial, Scientific, and Medical (frequency bands) | ISMA | Internet Streaming Media Alliance | ISMN | International Standard Music Number | ISO | International Organization for Standardization | ISO | International Standards Organization | ISOC | Internet SOCiety | ISOC | Internet Society | ISODE | International Organization for Standardization Development Environment | ISP | Internet service provider | ISP | Internet Service Provider | ISPC | International Signaling Point Code | ISR | Intermediate Session Routing | ISS | Integrated Syndication Services | ISSI | Inter-Switching-System-Interface | ISTPA | International Security, Trust, and Privacy Alliance | ISU | Interactive service unavailable | ISUP | ISDN Service User Part | ISV | Independent Software Vendor | IT | Information Technology | IT | Information Technology | ITR | Intelligent Text Retrieval | ITSP | Internet Telephony Service Provider | ITT | International Telegraph and Telephone | ITU | International Telecommunication Union | ITU-R | International Telecommunication Union-Radiocommunications | ITU-T | ITU Telecommunication Standardization Sector | ITU-T | International Telecommunication Union-Telecommunications | ITV | Interactive TeleVision | IV | Initialization Vector | IVC | Interactive VideoConferencing | I-VOP | Intra-coded Video Object Plane | IVOR | Improving visibility of repair | IVR | Interactive Voice Response | IVV&T | Integrated Verification, Validation, and Testing | IW | Inside Wiring | IXC | IntereXchange Carrier (also IEC) | J2EE | Java2 platform Enterprise Edition | JAD | Joint Application Development | JAX RPC | Java Api for Xml-based RPC | JBIG | Joint Bi-level Image Experts Group | JDBC | Java DataBase Connectivity | JDC | Japan Digital Cellular | JDK | Java Development Kit | JEIDA | Japan Electronic Industry Development Association | JFIF | JPEG File Interchange Format | JIT | Just In Time | JMF | Java Media Framework | JMS | Java Messaging Service | JNG | Jpeg Network Graphics | JNI | Java Native Interface | JOLAP | Java Online Analytical Processing | JP2 | JPEG2000 | JPEG | Joint Photographic Experts Group | JPEG | Joint Photographic Experts Group | JPX | JPEG2000 extensions | JSSE | Java Secure Socket Extension | JTC | JTC | JUSE | Japanese Union of Scientists and Engineers | JVM | Java Virtual Machine | KA9Q | KA9Q NOS | KB | Kilobyte: One thousand and twenty-four bytes kbps kilo bit per second | Kbps | Kilo Bits Per Second | KBS | Knowledge Based Systems | KCA | Key Certification Authority | KDC | Key Distribution Center | KEA | Key Exchange Algorithm | KEE | Knowledge Engineering Environment | Kermit | extensible file transfer protocol | KEYB NLM | KEYBoard NetWare Loadable Modules | kHz | kiloHertz (thousands of cycles per second) | KIS | Knowbot Information Services | KMP | Key-Management Protocol | KPE | Knowledge Processing Environment | KSDS | Key Sequenced DataSet | ksps | Kilosamples per second | KSR | Keyboard Send and Receive | KSR | Key Send Receive | KSU | Key Service Unit | KTS | Key Telephone system | KTS | Key Telephone System | KVM | Keyboard Video Mouse | L2F | Layer 2 Forwarding | L2TP | Layer 2 Tunneling Protocol | LAI | Location Area Identity | LAMA | Local Automatic Message Accounting | LAN | Local area network | LAN | Local Area Network | LANDA | Local Area Network Dealers Association | LANE | Local Area Network Emulation | LAP | Link Access Protocol (or Procedure) | LAPACK | Linear Algebra PACKage | LAPB | Link Access Procedure Balanced | LAP-B | Link Access Procedure Balanced | LAP-B | Link Access Protocol-Balanced | LAP-D | Link Access Procedure- Digital channel (ISDN) | LAT | Local Area Transport (Digital Equipment Corporation) | LATA | Local Access and Transport Area (USA) | LATM | Low-overhead Audio Transport Multiplexing | LB | Low-band | LBA | Location Based Advertising | LBS | Location Based Service | LBS | Location Based Services | LCD | Liquid Crystal Display | LCD | Liquid Crystal Display | LCN | Local Channel Number | LCR | Least Cost Routing | LD | Laser Diode | LD-AAC | Low Delay Advanced Audio Coding | LDAP | Lightweight Directory Access Protocol | LDC | Long Distance Carrier | LD-CELP | Low Delay Code-Excited Linear Prediction | LEC | Local Exchange Carrier | LED | Light emitting diode | LED | Light-Emitting Diode | LEO | Low-Earth-Orbit | LF | Low Frequency (30 kHz to 300 kHz) | LFE | Low Frequency Enhancement/Effects | LLC | Logical Link Control | LLP | Lower Layer Protocol | LLU | Local loop unbundling | LMDS | Local Multipoint Distribution Services | LMS | Location and Monitoring Service | LMU | Location Measurement Unit | LNS | L2tp network server [cisco] - a home gateway | LOAS | Low Overhead Audio Stream | LPC | Linear Predictive Coding | LPDE | Local Position Determining Entity | LPSTR | Long Pointer to String | LPWSTR | Long Pointer to Wide String | LRC | Longitudinal Redundancy Check | LSA | Link-State Advertisement | LSB | Least Significant Bit | LSI | Large-Scale Integration | LSP | Linear Spectral Pairs | LT2TP | Layer 2 tunnelling protocol | LTP | Long Term Prediction | LTRIP | Line test & routining improvement programme | LU | Logical Unit (IBM) | M/S | Mid/Side | M4AudioLC | MPEG-4 Audio Patent Licensing Committee | M4SystemsPHG | MPEG-4 Systems Patent Holders Group | MAC | Multiplexed Analog Components | MAC | Media Access Control, or Move, Add, and Change | MAN | Metropolitan Area Network | MAP | Manufacturers Application Protocol (ISO, General Motors), or Mobile Applications Port | MAPI | Messaging Applications Programming Interface (Microsoft) | MAPS | Maps Application Provisioning System | MASE | A middleware technology in wireless communication systems | MAU | Multistation Access Unit | MAUi | Mobile Audio Internet Working Profile | MB | megabyte | MBps | Megabytes per second | MC | Management Center or Message Center | MCA | Micro Channel Architecture (IBM) | MCNS | Multimedia Cable Network System | MCU | Multipoint Control Unit | MCU | Multipoint Control Unit | MD | Mediation Device | MDF | Main distribution frame | MDF | Main Distribution Frame | MDN | Mobile Directory Number | MDS | Monitoring and Discovery Service | MEGACO | Media Gateway Control | MEO | Middle-Earth-Orbit | MES | Master Earth Station | MF | Mediation Function, or Medium Frequency (300 kHz to 3 MHz) | MFA | MPLS Frame Relay ATM Forum | MFO | Microformat Object | MGCP | Media Gateway Control Protocol | MHP | Multimedia Home Platform | MHS | Message Handling Source MHz megahertz (millions of cycles per second) | MIB | Management Information Base | MIB | Management Information Base | MIC | Management Integration Consortium | MIDI | Musical Instrument Digital Interface | MILNET | Military Network (USA) | MIMD | Multiple Instruction, Multiple Data | MIME | Multipurpose Internet Mail Extensions | MIME | Multipurpose Internet Mail Extensions | MIMO | Multiple-Input Multiple-Output | MIN | Mobile Identification Number | MIPS | Million Instructions Per Second | MIPS | Millions of Instructions Per Second | MIS | Management Information Services, or Marketing Intelligence System | MISO | Multiple Input Single Output | MISU | Multidwelling ISU | MJ2 | Motion JPEG2000 | MLS | Mobile Location Services | MMDS | Multichannel, Multipoint Distribution Service | MMS | Multimedia Message Service | MMU | Memory Management Unit | MO | Magneto-Optical Modem Modulator/demodulator | MOSPF | Multicast Open Shortest Path First | MOU | Minutes of Use, or Memorandum of Understanding | MP3 | MPeg-1 audio layer 3 | MPEG | Motion Picture Experts Group | MPEG-4 | Moving Pictures Experts Group 4 | MPLS | Multi Protocol Label Switching (IETF) | MPOA | Multi-Protocol Over Atm | MPOE | Minimum Point of Entry | MPPP | Multilink Point-to-Point Protocol | MPS | Media Publishing System | MRCP | Media Resource Control Protocol | MRI | Magnetic Resonance Imaging | ms | millisecond (thousandth of a second) | MSC | Mobile Switching Center | MSF | Major service fault | MSI | Major service incident | MSIP | Multi-services intranet platform | MSN | Microsoft Network | MSO | Major service outage | MSRN | Mobile Station Roaming Number | MSS | Mobile Satellite Service | MTBF | Mean Time Between Failure | MTP | Message Transfer Part (IN) | MTS | Message Telecommunications Service | MTSO | Mobile Telephone Switching Office | MTTR | Mean Time To Repair | MTU | Maximum transmission unit | MTU | Maximum Transmission Unit | MUX | Multiplexor card | MV | Motion Vector | MVDS | Microwave Video Distribution System | MVPD | Multichannel Video Programming Distributor | MVPRP | Multivendor Problem Resolution Process | NACG | Networked Apartment Communications Gateway | NADIB | Narrow Band Audio Digital Broadcasting | NAFTA | North American Free Trade Agreement | NAK | Negative Acknowledgement | NAM | Numeric Assignment Module | N-AMPS | Narrowband Advanced Mobile Phone Service | NANP | North American Numbering Plan | NAP | Network Access Point | NAS | NASA Advanced Supercomputing division | NAS | Network Attached Storage | NAT | Network address translation | NATA | North American Telecommunications Allocation | NAU | Network Addressable Unit (IBM) | NB | Narrowband | NB CELP | Narrowband CELP | NBS | National Bureau of Standards | NC | Network Computer | NCAS | Network configuration & assignment system | NCB | No connection to blue screen | NCC | Network Control Center | NCH | No connection to home gateway router | NCIF | Not an acronym an operational support system | NCP | Network Control Program (IBM SNA), or Network Control Point | NCR | No connection to ras | NCSA | National Center for Supercomputing Applications | NCT | Node Coding Tables | NE | Network Element | NEBS | New Equipment Building Specifications | NECA | National Exchange Carrier Association | NEF | Network Element Function | NetBIOS | Network Basic Input-Output System (Microsoft) | NewPred | New Prediction | NFM | Network fault management | NFS | Network File System (or Server) | NIC | Network Interface Card | NIC | Network Interface Card, or Network Information Center (Internet Registry) | NiCad | Nickel Cadmium | NID | Network Interface Device | NiMH | Nickel-Metal Hydride | N-ISDN | Narrowband Integrated Services Digital Network | NIST | National Institute of Standards and Technology | NIU | Network Interface Unit | NIU | Network Interface Unit | NLM | NetWare Loadable Module (Novell) | nm | nanometer | NMC | Network management centre | NMC | Network Management Center | NMF | Network Management Forum (now TMF) | NML/NMS | Network Management Layer/Network Management Service | NMS | NetWare Management System (Novell) | NNM | Network Node Manager (Hewlett-Packard) | NOC | Network Operations Center | NOC | Network Operations Center | NOS | Network Operating System | NPF | Network Processing Forum | NPI | New Product Introduction | NREN | National Research and Education Network (USA) | NRP | Network route processor | NRZ | Non-Return to Zero | NSA | National Security Agency | NSC | No syncronisation | NSF | National Science Foundation (USA) | NSK | Non-Stop Kernel (Compaq) | NSP | Network switch processor | NSS | Network Switching Sub-system (GSM) | NSSA | Not-So-Stubby Area | NSSG | Network Solutions and Service Group (Nortel) | NT | Network Termination, or New Technology, also Windows NT (Microsoft) | NTE | Network terminating equipment | NTE | Network Terminating Equipment | NTLM | Windows NT LAN Manager | NTSA | Networking Technical Support Alliance | NTSC | National Television Standards Committee | NTSC | National Television Standards Committee | NTT | Nippon Telegraph and Telephone Corporation | NTU | Network termination unit | NTU | Network Termination Unit | NWP | No web pages | OA&M | Operations, Administration and Maintenance | OAM | Operations, administration and maintenance | OAM&P | Operations, Administration, Maintenance and Provisioning | OC | Optical Carrier | OC-1 | Optical Carrier Signal, Level 1 (51.84 Mbps) | OC-12 | Optical Carrier Signal, Level 12 (622.08 Mbps) | OC-18 | Optical Carrier Signal, Level 18 (933.12 Mbps) | OC-192 | Optical Carrier Signal, Level 192 (9.952 Gbps) | OC-24 | Optical Carrier Signal, Level 24 (1.244 Gbps) | OC-256 | Optical Carrier Signal, Level 256 (13.271 Gbps) | OC-3 | Optical Carrier Signal, Level 3 (155.52 Mbps) | OC-36 | Optical Carrier Signal, Level 36 (1.866 Gbps) | OC-48 | Optical Carrier Signal, Level 48 (2.488 Gbps) | OC-9 | Optical Carrier Signal, Level 9 (466.56 Mbps) | OC-96 | Optical Carrier Signal, Level 96 (4.976 Gbps) | OCAP | OpenCable Application Platform | OCB | Order control board | OCDRIS | OpenCable Digital Receiver Interface Specification | OCI | Object Content Information | OCR | Object Clock Reference | OCR | Optical Character Recognition | OCSP | On-line Certificate Status Protocol | OCUR | OpenCable Unidirectional Receiver | ODBC | Open Database Connectivity (Microsoft) | ODS | Operational Data Store | OEM | Original Equipment Manufacturer | OFB | Output FeedBack | OFDM | Orthogonal Frequency Division Multiplexing | OGSA | Open Grid Services Architecture | OGSI | Open Grid Services Infrastructure | OIF | Optical Internetworking Forum | OLAP | Online Analytical Processing | OLE | Object Linking and Embedding (Microsoft) | OLOs | Other licensed opertors | OMA | Object Management Architecture | OMC | Operations and Maintenance Centre (GSM) | OMF | Object Management Framework | OMG | Object Management Group | ONT | Optical Network Terminal | OOF | Out Of Frame Defect | OOH | Out of hours | OOP | Object-Oriented Programming | OPSU | ONT Power Supply Unit | ORB | Object Request Broker | OS | Operating System | OS/2 | Operating System/2 (IBM) | OSD | Operational service date | OSF | Open Software Foundation | OSI | Open Systems Interconnection | OSI | Open Systems Interconnection (ISO), or Objective Systems Integrator | OSP | OutSide Plant | OSPF | Open Shortest Path First | OSPFv3 | Open Shortest Path First for IPv6 | OSS | Operational support systems | OSS | Operations Support Systems | OTA | Over The Air Activation | OTD | Open Terminal Directive (European Union) | P2P | Person-to-Person | P3P | Platform for Privacy Preferences Project | PABX | Private Automatic Branch eXchange | PAC | Parametric Audio Coding | PACS | Personal Access Communications System | PAD | Packet Assembler-Disassemble | PAL | Phase Alternation Line | PAL | Phase Alternating by Line | PAL-M | Phase-Alternating Line - NTSC format | PAM | Pulse Amplitude Modulation | PAN | Personal Area Network | PAP | Password Authentication Protocol | PAT | Program Association Table | PBLAS | Parallel Basic Linear Algebra Subprograms | PBX | Private Branch eXchange | PC | Personal Computer | PCB | Printed Circuit Board | PCI | Peripheral Component Interconnect | PCIA | Personal Communications Industry Association | PCM | Pulse Code Modulation | PCMCIA | Personal Computer Memory Card Industry Association | PCN | Personal Communications Networks | PCO | Private Cable Operator | PCR | Program Clock Reference | PCS | Physical Coding Sublayer | PCS | Personal Communications Services | PCV | Path Coding Violation Error Event | PDA | Personal Digital Assistant | PDA | Personal Digital Assistant | PDC | Personal Digital Cellular (Japan) | PDE | Position Determining Entity | PDE | Positioning Determination Entity | PDH | Plesiochronous Digital Hierarchy | PDN | Packet Data Network or Public Data Network | PDU | Protocol Data Unit | PEAP | Protected Extensible Authentication Protocol | PET | Permanent engaged tone | PEW | Planned engineering works | PGPS | Packet Generalized Processor Sharing | PHY | Physical Layer | PII | Personally Identifiable Information | PIM | Processor In Memory | PIM | Personal Information Manager | PIM-DM | Protocol Independent Multicast- Dense Mode | PIM-SM | Protocol Independent Multicast - Sparse Mode | PIN | Personal Identification Number, or Positive-Intrinsic-Negative | PING | Packet internet groper | PiP | Picture in Picture | PLEC | Patent Licensing and Enforcement Companies | PLMN | Public Land Mobile Network | PL-PDU | Protection Layer Protocol Data Unit | PM | Phase Modulation | PMA | Physical Medium Attachment | PMD | Physical Medium Dependent | PMD | Physical Media-Dependent | PNA | Presence Network Agent | PnP | Plug-and-Play | PNS | Perceptual Noise Substitution | POD | Point of Deployment Module | PoP | Point of presence | POP | Point Of Presence | PoS | Point Of Sale | POTS | Plain Old Telephone Service | POTS | Plain Old Telephone Service | PPC | Pay-Per-Call | P-Picture | Predictive-coded Picture | PPP | Point to Point Protocol | PPP | Point-to-Point Protocol | PPPoA | Point to point protocol over asynchronous transfer mode | PPPoE | Point to point protocol over ethernet | PPV | Pay-Per-View | PPV | Pay-Per-View | PRCS | Philips Radio Communications Systems | PRI | Primary Rate Interface | PRI | Primary Rate Interface (ISDN) | PRIME | Privacy and Identity Management for Europe | PROM | Programmable Read-Only Memory | PSK | Phase Shift Keying | PSN | Packet-Switched Network | PSTN | Public Switched Telephone Network | PSTN | Public Switched Telephone Network | PSU | Power supply unit | PT | Payload Type | PTO | Precision testing officer | PTT | Post, Telegraph and Telecommunications (Government Departments) | PU | Physical Unit (IBM SNA) | PUC | Public Utility Commission (USA) | PVC | Permanent virtual circuit | PVC | Permanent Virtual Circuit | PVCC | Permanent virtual circuit connection | PVN | Private Virtual Network | PVR | Personal Video Recorder | Q3 | Network Management Interface (ITU-T) | QA | Quality Assurance | QAM | Quadrature Amplitude Modulation | QCIF | Quarter Common Intermediate Format | QEDI | Quod Erat Demonstrandum | QoS | Quality of Service | QoS | Quality of Service | QP | Quantizer Parameter | QT | QuickTime | RACE | Research for Advanced Communications in Europe | RADIUS | Remote Access Dial-in User Services | RAID | Redundant Array of Inexpensive Disks | RAM | Random Access Memory | RAM | Random Access Memory | RAN | Remote Antenna Node | RAP | Router activation platform | RARA | Rang ahead rang after | RAS | Registration, Admission and Status | RASBOX | Remote access service box (cisco router) | RBAC | Role-Based Access Control | RBES | Rule-Based Expert Systems | RBOC | Regional Bell Operating Company (USA) | RC4 | Symmetric Key Stream Cipher | RCU | Remote Control Unit | RDBMS | Relational Database Management System | RDD | Rights Data Dictionary | RDSS | Radio Determination Satellite Service | REIT | Real Estate Investment Trust | REL | Rights Expression Language | REWERSE | Reasoning on the Web with Rules and Semantics | RF | Radio Frequency | RFC | Request For Comment (IETF) | RFI | Radio Frequency Interference, or Request For Information | RFP | Request For Proposal | RFQ | Request for Quotation | RGB | Red, Green, Blue | RGU | Revenue Generating Unit | RIB | Routing Information Base | RIP | Routing Information Protocol | RISC | Reduced Instruction Set Computing | RISC | Reduced Instruction Set Computing | RJE | Remote Job Entry | RMON | Remote Monitoring | RMP | Remote Media Processor | ROADM | Reconfigurable Optical Add/Drop Multiplexer | ROI | Region of Interest | ROI | Return On Investment | ROM | Read Only Memory | ROM | Read-Only Memory | RPC | Remote Procedure Call | RPCU | Radio Port Control Unit | RPE | Regular Pulse Excitation | RSI | Repetative Strain Injury | RSSI | Receive Signal Strength Indication | RSVP | ReSerVation Protocol | RSVP | Resource ReSerVation Protocol (IETF) | RT | Remote Terminal | RTCP | Real Time Transport Protocol | RTNR | Ringing tone no reply | RTP | Real-time Transport Protocol | RTSP | Real Time Streaming Protocol | RTU | Right To Use | RUS | Rural Utility Service | RVLC | Reversible Variable Length Code | RWT | Right when tested | RX | Receive | RXER | Robust XML Encoding Rules | s | Second | S x S | Step-by-Step | S/MIME | Secure Multipurpose Internet Mail | SA | Structured Audio | SA | Source Address | SAA | Systems Application Architecture | SAA | Systems Application Architecture (IBM) | SAAL | Signaling ATM Adaptation Layer | SABME | Set Asynchronous Balanced Mode Extended | SACD | Super Audio Compact Disc | SACL | System Access Control List | SAD | Sum of Absolute Differences | SAM | Service Application Manager | SAML | Security Assertion Markup Language | SAN | Storage Area Network or System Area Network (Himalaya) | SAOL | Structured Audio Orchestra Language | SAP | Separate Audio Program | SAR | Segmentation And Re-assembly | Sarbanes-Oxley | Sarbanes-Oxley Act | SAS | Single Attached Station | SASBF | Structured Audio Sample Bank Format | SASL | Simple Authentication and Security Layer | SAW | Surface Acoustic Wave | SB | Small Business | SBT | Standalone BOSS Transactor | SC | Standards Committee (ISO) | SC29 | Subcommittee 29 | SCC | Serial Communications Chip | SCCP | Signaling Connection Control Part | SCCP | Signaling Connection Control Point (IN) | S-CDMA | Synchronous Code Division Multiple Access | SCE | Service Creation Environment (IN) | SCI | Strategic Computing Initiative | SCIM | Service Capability Interaction Manager | SCMS | Serial Copy Management System | SCP | Service Control Point | SCP | Service Control Point (IBM-SNA) | SCPC | Single Channel Per Carrier | SCR | Sustainable Cell Rate | SCSI | Small Computer System Interface | SCSI | Small Computer Systems Interface | SCSP | Server Cache Synchronization Protocol | SCTE | Society of Cable Telecommunications Engineers | SCTP | Stream Control Transmission Protocol | SD | Secure Digital Memory Cards | SDCD | Secondary Received Line Signal Detector | SDH | Synchronous Digital Hierarchy | SDH | Synchronous Digital Hierarchy | SDK | Software Development Kit | SDL | Syntactic Description Language | SDLC | System Development Life Cycle | SDLC | Synchronous Data Link Control (IBM) | SDM | System Decoder Model | SDN | Software-Defined Network (AT&T) | SDP | Session Description Protocol | SDRAM | Synchronous Dynamic Random Access Memory | SDSL | Symmetric Digital Subscriber Line | SDSL | Symmetrical Digital Subscriber Line | SDT | Service Definition Table | SDTV | Standard-Definition Television | SDV | Segment Delay Value | SEAL | Software-Optimized Encryption Algorithm | sec | second | SECAM | Sequential Color with Memory | SEI | Software Engineering Institute | SERC | Satellite Educational Resources Consortium | SES | Severely Errored Seconds | SET | Secure Electronic Transaction | SF | Super Frame | SFI | Special fault investigaton | SFID | Service Flow Identifier | SFU ONT | Single Family Unit Optical Network Terminal | SGCP | Simple Gateway Control Protol | SGML | Standard Generalized Markup Language | SGMP | Simple Gateway Monitoring Protocol | SH | Secondary Hub | SHDS | Short Haul Data Service | SHF | Super High Frequency (3 GHz to 30 GHz) | S-HTTP | Service Hypertext Transport Protocol | SI | System Integrator | SIA | Satellite Industry Association | SID | Sound Interface Device | SIDB | Service inventory database | SIF | Standard Image Format | SIM | Subscriber Identification Module | SIMD | Single Instruction Multiple Data | SIMO | Single Input Multiple Output | SIMPLE | Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions | SIP | Session Initiation Protocol | SIP | Session Initiation Protocol (IETF) | SIPP | Single In-line Pin Package | SIT | Satellite Information Table | SKU | Stock-Keeping Unit | SLEE | Service Logic Execution Environment | SL-ESF | Signaling Link Extended Superframe Format | SLF | Subscriber Locator Function | SLIC | Subscriber Loop Interface Circuit | SLIP | Serial Line Internet Protocol (IETF) | SLOT | Appointment slot | SLU | Secondary Logical Unit | SM | System Manager | SMATV | Satellite Master Antenna Television | SMB | Small to Medium Business | SMC | Service Management Center | SMDS | Switched Multimegabit Data Service | SMDS | Switched Multimegabit Data Services | SME | Small to Medium Enterprises | SMI | Structure of Management Information | SMIL | Synchronized Multimedia Integration Language | SML/SMS | Service Management Layer/Service Management Service | SMP | Shared Memory Multiprocessor | SMPTE | Society of Motion Picture and Television Engineers | SMR | Specialized Mobile Radio | SMRP | Simple Multicast Routing Protocol | SMS | Short Message Service | SMS | Service Management System | SMSC | Short Message Service Center | SMT | Status Monitoring Transponder | SMT | Station Management | SMTP | Simple Mail Transfer Protocol | SMTP | Simple Mail Transfer Protocol (IETF) | SN | Switching Network or Station Number | SNA | System Network Architecture | SNA | Systems Network Architecture (IBM) | SNAP | Sub-Network Access Protocol | SNE | Sub-network element | SNI | SNA Network Interconnect | SNI | Subscriber Network Interface | SNMP | Simple Network Management Protocol | SNMP | Simple Network Management Protocol | Snort | Open Source Network Intrusion Prevention and Detection System | SNP | Sequence Number Protection | SNR | Signal to Noise Ratio | SNT | Source Name Table | SOA | Service Oriented Architecture | SOAP | Simple Object Access Protocol | SOHO | Small Office-Home Office | SONET | Synchronous Optical NETwork | SONET | Synchronous Optical Network (ANSI) | SP | Service package (also formerly service provider) | SP | Service Provider | SPA | Software Publishers Association | SPARC | Scalable Processor Architecture Reduced instructionset Computer | SPC | Statistical Process Control | SPCC | System Policy Compliance Check | SPCS | Stored Program Control System | S-PCS | Satellite - Personal Communications System | SPE | Synchronous Payload Envelope | SPF | Shortest Path First | SPI | Serial Peripheral Interface | SPID | Service Profile IDentifier | SPIN | Secure Peered Internet | SPML | Service Provisioning Markup Language | SPMP | Software Project Management Plan | SPOC | Single Point of Contact | SPP | Sequenced Packet Protocol | SPX | Sequenced Packet Exchange (Novell) | SQ | Signal Quality Detect | SQCIF | Sub Quarter Common Intermediate Format | SQL | Structured Query Language | SRA | System Reference Architecture | SRB | Source-Route Bridging | SRD | Secondary Receive Data | SRM | Session Resource Manager | SRTS | Secondary Request To Send | SS | Switching System | SS#7 | Signaling System # 7 (ITU-T) | SS7 | Signaling System 7 (ANSI) | SSB | Single Sideband | SSCP | System Services Control Point | SSCP | System Services Control Point (IBM) | SSD | Service solution design | SSI | Small Scale Integration | SSL | Secure Sockets Layer | SSL | Secure Sockets Layer (IETF) | SSP | Service Switching Point (IN) | SSR | Scalable Sample Rate | SSV | Site to Site Virtual Priviate Network | STB | System Time Base | STC | System Time Clock | STD | Secondary Transmit Data | STDM | Statistical Time Division Multiplexing | STM | Synchronous Transfer Mode | STP | Shielded Twisted-Pair, or Signal Transfer Point (IN) | STT | Satellite Text Table | STUN | Simple Traversal of UDP through NATs | STX | Start of Transmission | SUBT | Subscriber Terminal | SVC | Switched Virtual Circuit | SVD | Singular Value Decomposition | SVG | Scalable Vector Graphics | SXS | Step-by-Step Switch | SYNC | Synchronized/synchronization | SYNTRAN | Synchronous Transmission | T1 | Digital Carrier 1.544 megabits per second | T1 | Transmission service at the DS1 rate of 1.544 Mbps | T2R | Trusted Transaction Roaming | T3 | Transmission service at the DS3 rate of 44.736 Mbps | TA | Terminal Adapter | TAB | Technical Advisory Board | TAC | Terminal Access Controller | TACACS | Terminal Access Controller Access Control System | TACACS+ | Single-User Network Access Security | TACS | Total Access Communications System | TAG | Technical Advisory Group | TAI | International Atomic Time | talkies | movies with sound | TAM | Test access matrix | TAPI | Telephony Application Programming Interface | TAPI | Telephony Application Programming Interface (Microsoft) | TAT | Transmux Channel Association Tag | TAXI | Transparent Asynchronous Transmitter/Receiver Interface | TB | terabyte (trillion bytes) | T-BCSM | Terminating Basic Call State Model | Tbps | terabit per second | TCA | Telecommunications Computing Architecture | TCAP | Transaction Capability Application Part | TCAP | Transaction Capabilities Application Part (IN) | T-Carrier | Trunk Carrier | TCG | Trusted Computing Group | TCM | Trellis Coded Modulation | TCP | Transmission Control Protocol | TCP | Transmission Control Protocol (IETF) | TCP/IP | Transmission Control Protocol/Internet Protocol | TCP/IP | Transmission Control Protocol /Internet Protocol (IETF) | TDAC | Time Domain Aliasing Cancellation | TDD | Time Division Duplexing | TDM | Time Division Multiplexing | TDM | Time Division Multiplexer | TDMA | Time Division Multiple Access | TDMA | Time Division Multiple Access | TDMF | Transparent Data Migration Facility | TDOA | Time Difference of Arrival | TDR | Time Domain Reflectometry | TDT | Time Domain Transmissometry | TE | Traffic Engineering | TeMIP | Telecommunications Management Information Platform (Compaq) | TETRA | Terrestrial Trunked Radio | TETRA | Trans-European Trunked Radio Access (ETSI) | TFT | Thin-Film-Transistor | TFTP | Trivial File Transfer Protocol | TGS | Ticket Granting Service | TGSR | Trunk Group Service Request | TGSRNO | Trunk Group Service Request Number | TGT | Ticket-Granting Ticket | THD | Total Harmonic Distortion | THX | Tomlinson Holman eXperience | TI | Terrestrial Interference | TIA | Telecommunications Industry Association | TIA | Telecommunications Industry Association | TIFF | Tag Image File Format | TINA | Telecommunications Information Networking Architecture | TINA | Telecommunications Information Networking Architecture | TIU | Telco Interface Unit | TKIP | Temporal Key Integrity Protocol | TL1 | Transaction Language 1 | TL1 | Transaction Language 1 | TLI | Transport Layer Interface | TLS | Transport Layer Security | TLS | Transport Layer Security (IETF) | TLV | Type Length Value | TMC | Time Multiplex Component | TMF | Telecommunications Management Forum | TML | TransMux Layer | TMN | Telecommunications Management Network | TMN | Telecommunications Management Network | TNS | Temporal Noise Shaping | TNT | Transponder Name Table | TO | Tandem Office or Toll Office | TOA | Time of Arrival | TOM | Telecommunications Operations Map | TOS | Termination of service | TOV | Threshold of Visibility | TPON | Telephone Passive Optical Network | TQFP | Thin Quad Flat Pack | TQM | Total Quality Management | TR | Temporal Reference | TR58 | Multi-Service Architectures and Framework Requirements | TR59 | Next Generation Network Architecture | TR69 | CPE WAN Management Protocol | TRAC | Telephone Return Access Concentrator | Trak | Track | TransMux | Transport Multiplex | TRI | Telephony Return Interface | TRIP | Telephony Routing in IP Networks | TRS | Timing Reference Signals | TRS | Telecommunications Relay Services | TRT | Total Running Time | TRTS | Telephone Return Termination System | TRUSTe | Make Privacy Your Choice | TSAPI | Telephony Services Application Programming Interface (Novell) | TSAR | Teleservice Segmentation And Reassembly | TSB | Telecommunication Standardization Bureau | TSDU | Transport Service Data Unit | TSI | Time Slot Interchange | TSI | Time Slot Interchange | TSID | Transmission Signal Identifier | TSO | Tape Speed Override | TSSI | Time Slot Sequence Integrity | TTP | Trusted Third Party | TTS | Text-To-Speech | TTSI | Text-To-Speech Interface | TTY | TeleType | TUP | Telephone User Part | TV | Television | TV | Television | TVCT | Terrestrial Virtual Channel Table | T-VoD | True Video On Demand | TVRO | Television Receive Only | TwinVQ | Transform Domain Weighted INterleave Vector Quantization | TWX | Teletypewriter Exchange (also known as telex) | TX | Transmit | UA | Unnumbered Acknowledgement | UADSL | Universal Asymmetric Digital Subscriber Line | UART | Universal Asynchronous Receiver/Transmitter | UART | Universal Asynchronous Receiver/Transmitter | UAS | User Adaptive Systems | UBC | Utility Based Computing | uBR | Universal Broadband Router | UBR | Unspecified Bit Rate | UCD | Upstream Channel Descriptor | UCM | Universal Call Model | UCP | User Control Point | UCS | Universal Character Set | UCT | Universal Coordinated Time | UDA | UPnP Device Architecture | UDDI | Universal Description Discovery and Integration | UDLP | UniDirectional Link Protocol | UDP | User Datagram Protocol | UDP | User Datagram Protocol (IETF) | UEP | Unequal Error Protection | UFO | Ultra High Frequency Follow-on | U-HDTV | Ultra High Definition Television | UHDV | Ultra High Definition Video | UHF | Ultra High Frequencies | UHF | Ultra High Frequency (300MHz to 3 GHz) | UI | User Interface | UIMSBF | Unsigned Integer Most Significant Bit First | UIO | Universal I/O | UKERNA | United Kingdom Education and Research Networking Association | UL | Underwriters Laboratory | ULL | Unbundled Local Loop | ULP | Upper Layer Protocol | UMS | Universal Messaging System | UMTS | Universal Mobile Telecommunications System (ETSI) | UN | User to Network | UN | United Nations | UNI | User Network Interface | UNI | User-Network Interface | UNI-C | UNI Signaling Agent | Unicode | Unified character encoding | U-NII | Unlicensed National Information Infrastructure | UNI-N | UNI Signaling Agent | UNI-OSP | VoIP Authentication | UNISON | Unidirectional SONET | UNIX | Open Operating System | UNMA | Unified Network Management Architecture | UPA | UltraSPARC Port Architecture | UPC | Usage Parameter Control | UPL | User Program Layer | UPnP | Universal Plug and Play forum | UPS | Uninterruptible Power Supply | UPS | Uninterruptible Power Supply | UPSR | Unidirectional Path Switched Ring | UPSTREAM | Data transported from end user to customer | UPT | Universal Personal Telecommunications | UPTN | Universal Personal Telecommunications Number | UR | User Registrar | URI | Uniform Resource Indicator | URL | Uniform Resource Locator | URL | Universal Resource Locator (WWW) | URN | Uniform Resource Name | USB | Universal Serial Bus | USDA | United States Department of Agriculture | USENET | Distributed Discussion System | USF | Universal Server Farm (IBM) | USID | Universal Service Identifier | USM | User-based Security Model | USNO | United States Naval Observatory | USO | Universal Service Obligation | USOC | Universal Service Order Code | USSD | Unstructured Supplementary Service Data | USTA | United States Telephone Association | UT | Universal Time | UTC | Coordinated Universal Time | UTP | Unshielded Twisted Pair | UTP | Unshielded Twisted - Pair | UTRA | Universal Terrestrial Radio Access | UTS | Universal Terminal Support | UUCP | UNIX-to-UNIX Copy Program | UUT | Unit Under Test | V.24 | Control Protocol for Serial Data | V.25bis | Synchronous Serial Interfaces | VAD | Voice Activated Dialing | VAI | Value Added Internetwork | VAN | Value-Added Network | VANC | Voice Activated Network Control | VAP | Value Added Process | VAPN | Virtual Access to Private Networks | VAR | Value Added Reseller | VAR | Value-Added Reseller | VASP | Value Added Service Provider | VAX | Virtual Address eXtension | VB | Visual Basic | VB.NET | Visual Basic for the .NET framework | VBI | Vertical Blanking Interval | VBR | Variable Bit Rate | VBR | Variable Bit Rate | VBS | Voice Broadcast Service | VBScript | Visual Basic Scripting Edition | VBV | Video Buffering Verifier | VC | Virtual Circuit | VC | Virtual Circuit | VCA | Virtual Communications Address | VCC | Virtual Channel Connection | VCD | Virtual Circuit Descriptor | VCEG | Video Coding Experts Group | VCI | Virtual Channel Identifier | VCL | Virtual Channel Link | VCN | Virtual Channel Number | VCO | Voltage Controlled Oscillator | VCR | Video Cassette Recorder | VCR | Videocassette Recorder | VCS | Virtual Channel Server | VCT | Virtual Channel Table | VCV | Video Complexity Verifier | VCXO | Voltage Controlled Crystal Oscillator | VDC | Volts Direct Current | VDSL | Very high rate Digital Subscriber Line | VDSL | Very high-speed Digital Subscriber Line | VDT | Video Dial Tone | VDU | Video Display Unit | VESA | Video Electronic Standards Association | VF | Voice Frequency | VF | Voice Frequency | VFAT | Virtual File Allocation Table | VfW | Video for Windows | VG | Voice Grade | VGA | Video Graphics Array | VGM | Voice Grade Media | VHE | Virtual Home Environment | VHF | Very High Frequencies | VHF | Very High Frequency (30 MHz to 300 MHz) | VHSIC | Very High Speed Integrated Circuit | VINES | Virtual Integrated NEtwork Service | VISP | Virtual Internet Service Provider | VITS | Vertical Interval Test Signal | VLAN | Virtual Local Area Network | VLCF | Variable length Convergence Function | VLDB | Very Large Database | VLF | Very Low Frequency (less than 30 kHz) | VLIW | Very Long Instruction Word | VLM | Virtual Loadable Module | VLR | Visitor Location Register | VLR | Visitor Location Register | VLSI | Very Large Scale Integration | VLSI | Very Large-Scale Integration | VLT | Vault | VM | Virtual Machine | VM | Virtual Machine (IBM) | VME | Virtual Machine Environment | VML | Vector Markup Language | VMS | Virtual Memory System | VMS | Virtual Machine System (Digital Equipment Corporation) | VMV | Video Memory Verifier | VNC | Virtual Network Connection | VNM | Value Network Mapping | VoATM | Voice over Asynchronous Transfer Mode | VoD | Video on Demand | VOD | Video On Demand | VoDSL | Voice over Digital Subscriber Line | VoIP | Voice over Internet Protocol | VoIP | Voice over IP | VP | Virtual Path | VPDN | Virtual Private Data Network | VPI | Virtual Path Identifier | VPN | Virtual Private Network | VPN | Virtual Private Network | VPX | Virtual Path cross-connect | VRC | Virtual Redundancy Check | VRI | Video Remote Interpreting | VRRP | Virtual Router Redundancy Protocol | VRS | Video Relay Service | VS | Virtual Server | VSAM | Virtual Storage Access Method | VSAT | Very Small Aperture Terminal | VSAT | Very Small-Aperture Terminal | VSB | Vestigial Side Band | VSE/ESA | Virtual Storage Extended/Enterprise Systems Architecture | VSP | Video Service Provider | VSWR | Voltage Standing Wave Ratio | VT | Virtual Terminal | VT | Virtual Terminal | VTAM | Virtual Telecommunications Access Method | VTAM | Virtual Telecommunications Access Method (IBM SNA) | VTP | Virtual Terminal Protocol | VTS | Virtual Tape Subsystems | W3C | World Wide Web Consortium | W3C | World Wide Web Consortium (also WWW3) | WACS | Wireless Access Communications System | WAE | Wireless Application Environment | WAIS | Wide Area Information Servers | WAN | Wide Area Network | WAP | Wireless Application Protocol | WAP | Wireless Application Protocol | WATS | Wide Area Telecommunications Service | WATS | Wide Area Telecommunications Service | WBEM | Web-Based Enterprise Management | WBI | Web-Based Intranets | WBMP | Wireless BitMaP | WCDMA | Wideband Code Division Multiple Access | W-CDMA | Wideband - Code Division Multiple Access | WCS | Wireless Communications Service | WDM | Wavelength Division Multiplexing | WDM | Wavelength Division Multiplexing | WDP | Wireless Datagram Protocol | WEP | Wired Equivalent Privacy | WFOV | Wide Field of View | WFQ | Weighted Fair Queuing | WG | Working Group | WGS | Worldwide Geodesic System | Whois | Netwide Directory Service | WIM | Wireless Identification Module | WIMP | Windows Icons Menus and Pointing Device | WINS | Windows Internet Naming Service | WLAN | Wireless Local Area Network | WLL | Wireless Local Loop | WLS | Wireless Location Services (SignalSoft) | WML | Wireless Markup Language | WML | Wireless Markup Language | WNP | Wireless Number Portability | WNT | Windows NT (Microsoft) | WORM | Write Once Read Many | WOSA | Windows Open Services Architecture | WPA | WiFi Protected Access | WPBX | Wireless Private Branch Exchange | WPS | Wireless Priority Service | WRC | World Radio Conference | WS | Work Station | WS | Workstation | WSDL | Web Services Definition Language | WSF | Workstation Function | WSFL | Web Services Flow Language | WSP | Wireless Session Protocol | WSRF | Web Service Resource Framework | WSS | Web Service Security | WSSRA | Windows Server System Reference Architecture | WTA | Wireless Telephony Application | WTLS | Wireless Transport Layer Security | WTLS | Wireless Transport Layer Security | WTN | Wiring Termination Node | WTO | World Trade Organization | WTP | Wireless Transaction Protocol | WWAN | Wireless Wide Area Network | WWAN | Wireless Wide Area Network | WWW | World Wide Web | WWW3 | World Wide Web Consortium (also W3C) | WYSIWYG | What You See Is What You Get | WYSIWYG | What You See Is What You Get | X.11 | application redirect protocol | X.21 | Circuit-switching Protocol | X.25 | Packet switching protocol standard for data networks | X.400 | Messaging Standard | X.500 | Data Networks and Open System Communications Directory | X.509 | Digital Certificate Standard | x10 | Home appliance/automation networking standard | X12 | Business-to-Business Electronic Exchange Standard | X2 | Small form-factor 10 Gb/s pluggable fiber optic transceiver | X25 | A Packet Switching Protocol | XACML | eXtensible Access Control Markup Language | XAIT | eXtended Application Information Table | XAP | eXtensible Authentication Point | XAUI | 10 Gigabit Attachment Unit Interface | X-Bar | Crossbar telephone exchange | XBRL | eXtensible Business Reporting Language | XC | Cross-Connect | XCAP | eXtensible Markup Language Configuration Access Protocol | XDR | eXternal Data Representation | XDS | eXtended Data System | xDSL | Digital Subscriber Line | xDSL | generic Digital Subscriber Line | XED | XML Enabled Directory | XENPAK | fiber-optic transceiver module | XFN | XHTML Friends Network | XFP | 10 Gigabit Small Form Factor Pluggable | XGMII | 10 Gigabit Medium Independent Interface | XGXS | XGMII Extender Sublayer | XHTML | eXtensible Hypertext Mark-up Language | XID | eXchange Identification | XIDMP | XML Internet Directly Mapped Protocol | XMDP | XHTML Meta Data Profiles | XML | eXtensible Markup Language | XML | Extensible Markup Language | XMPP | Extensible Messaging and Presence Protocol | XNS | Xerox Network System | XNS | Xerox Network System (Xerox Corporation) | XO | Crystal Oscillator | XoIP | Anything Over IP | XOT | X.25 Over TCP | XPD | Cross Polarization Discrimination | XQL | Xml Query Language | XrML | eXtensible Rights Markup Language | XRT | eXtended Remoting Technology | XSBI | 10 Gigabit Sixteen Bit Interface | XSL | eXtensible Stylesheet Language | XTACACS | Extended Terminal Access Controller Access Control System | Z39.50 | Information Retrieval Standard | ZBTSI | Zero Byte Time Slot Interchange | ZIP | Zone Information Protocol | ZIP | Zone Improvement Program (geographic codes/ USA) | ZLE | Zero-Latency Enterprise | ZLE | Zero Latency Enterprise (Compaq) | Z-Modem | file transfer protocol | Zombies | botnet, bot, or IRC bots | ZPDI | Zero Plus Dialing, Inc. | ZTLP | Zero Transmission Level Point | ZTLRP | Zero Transmission Level Reference Point |
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