| 1D | One-dimensional |
| 2D | Two-dimensional |
| 3D | Three-dimensional |
| 3DG | 3D Graphics |
| 3DV | 3D Video |
| 3G | Third Generation (mobile) |
| 3GPP | Third Generation Partnership Program |
| 8VSB | 8 Vestigial Side Band |
| AAC | Advanced Audio Coding |
| AAL | ATM Adaptation Layer |
| ACATS | Advisory Committee on Advanced Television Services |
| ACL | Agent Communication Language |
| ACM | Association of Computing Machinery |
| ACTS | Advanced Communication Technologies and Services |
| A/D | Analogue-to-Digital |
| ADAPT | Analogue Digital Analogue Parallel Transfer |
| AES | Audio Engineering Society |
| AFX | Animation Framework eXtension |
| AHG | Ad Hoc Group |
| AHRA | Audio Home Recording Act |
| ADSL | Asymmetric Digital Subscriber Line |
| aka | also known as |
| AMS | Agent Management System |
| AOE | Applications and Operational Environments |
| AP | Agent Platform |
| API | Application Programming Interface |
| ARAF | Augmented Reality Application Format |
| ARPA | Advanced Research Projects Agency |
| ASCII | American Standard Code for Information Interchange |
| ASP | Advanced Simple Profile |
| ATL | Accredited Testing Laboratories |
| ATM | Asynchronous Transfer Mode |
| ATSC | Advanced Television Systems Committee |
| ATV | Advanced Television |
| AU | Access Unit |
| AV | Audio-Visual |
| AVC | Advanced Video Coding |
| BAP | Body Animation Parametre |
| BBS | Bulletin Board Systems |
| BC | Backward Compatible |
| BDP | Body Definition Parametre |
| BE | Bandwidth Extension |
| BIFS | Binary Format for MPEG-4 Scenes |
| BiM | Binary format for MPEG-7 data |
| BoD | Board of Directors |
| BSD | Berkeley Software Distribution |
| CA | Conditional Access |
| CATV | Community Antenna Television |
| CC | Compact Cassette |
| CCIF | Comité Consultatif International Téléfonique |
| CCIT | Comité Consultatif International Télégraphique |
| CCITT | Comité Consultatif International Téléphonique et Télégraphique |
| CCIR | Comité Consultatif International pour les Radiocommunications |
| CCO | Convergence Core Ontology |
| CD | Committee Draft |
| CD | Compact Disc |
| CD-i | Compact Disc Interactive |
| CD-ROM | CD-Read Only Memory |
| CDMA | Code Division Multiple Access |
| CDN | Content Distribution Network |
| CDVA | Compact Description for Video Analysis |
| CDVS | Compact Description for Visual Search |
| CE | Consumer Electronics |
| CE | Core Experiment |
| CEC | Commission of the European Communities |
| CEL | Contract Expression Language |
| CELP | Code Excited Linear Predictive |
| CEN | Comité Européen de Normalisation |
| CENC | Common Encryption |
| CEPT | Conférence Européenne des Postes et Télécommunications |
| CfE | Call for Evidence |
| CfP | Call for Proposals |
| CG | Computer Graphics |
| CGA | Colour Graphic Adaptor |
| CI | Common Interface |
| CIF | Common Intermediate Format |
| CISAC | Confédération Internationale des Sociétés des Auteurs et des Compositeurs |
| CMAF | Common Media Application Format |
| CMTT | Commission Mixte pour les Transmission Télévisuelles et Sonores |
| CLI | Command Line Interface |
| CM | Commercial Module |
| COFDM | Coded Orthogonal Frequency Division Multiplexing |
| COM | Component Object Model |
| COMIS | Coding of Moving Images for Storage |
| CORBA | Common Object Request Broker Architecture |
| COST | Collaboration Scientifique et Technique |
| CP | Content Provider |
| CPS | Constrained Parameter Set |
| CPU | Central Processing Unit |
| CPS | Content Provider System |
| CP/M | Control Program for Microcomputers |
| CR | Conditional Replenishment |
| CRT | Cathode Ray Tube |
| CS | Coding Scheme |
| CS | Computer Science |
| CSS | Cascading Style Sheet Language |
| CSS | Content Scrambling System |
| CW | Control Word |
| D | Descriptor |
| DAB | Digital Audio Broadcasting |
| DAI | DMIF Application Interface |
| DAPA | Digital Audio and Picture Architecture |
| DARPA | Defense Advanced Research Projects Agency |
| DASH | Dynamic Adaptive Streaming over HTTP |
| DAT | Digital Audio Tape |
| DAVIC | Digital Audio-Visual Council |
| DB | Decoding Buffers |
| DC | Digital Communication |
| DCC | Digital Compact Cassette |
| DCOM | Distributed Component Object Model |
| DCT | Discrete Cosine Transform |
| DDL | Description Definition Language |
| DF | Directory Facilitator |
| DI | Digital Item |
| DIA | Digital Item Adaptation |
| DID | Digital Item Declaration |
| DIDL | Digital Item Declaration Language |
| DII | Digital Item Identification |
| DIM | Digital Item Method |
| DIP | Digital Item Processing |
| DIPS | Digital Image Processing System |
| DK | Disk Key |
| DM | Digital Media |
| DMM | Digital Media Manifesto |
| DMP | Digital Media Project |
| DMT | Digital Media Technologies |
| DMCA | Digital Millennium Copyright Act |
| DMIF | Delivery Multimedia Integration Framework |
| DMP | Digital Media Project |
| DMR | Digital Media Revolution |
| DNS | Domain Name System |
| DoD | Department of Defense |
| DPCM | Differential Pulse Code Modulation |
| DPI | Dot Per Inch |
| DRC | Dynamic Range Control |
| DRM | Digital Rights Management |
| DS | Description Scheme |
| DSM | Digital Storage Media |
| DSM-CC | Digital Storage Media Command and Control |
| DSP | Digital Signal Processor |
| DT | Description Tools |
| DT | Digital Technologies |
| DTD | Document Type Definition |
| DTS | Decoding Time Stamp |
| DVB | Digital Video Broadcasting |
| DVD | Digital Versatile Disc |
| DVS | Digital Video Recorder |
| D/A | Digital to Analogue |
| E2E | End-to-End |
| EBU | European Broadcasting Union |
| EC | European Commission |
| EC | Executive Committee |
| ECM | Entitlement Control Messages |
| ECMA | European Computer Manufacturers Association |
| EG | Expert Group |
| EGA | Enhanced Graphic Adaptor |
| EMM | Entitlement Management Messages |
| EN | European Norm |
| EPG | Electronic Program Guide |
| ER | Event Reporting |
| ES | Elementary Stream |
| ESI | Elementary Stream Interface |
| ESPRIT | European Strategic Program of Research and development in Information Technology |
| ETSI | European Telecommunication Standards Institute |
| EURASIP | European Signal Processing Association |
| FAB | Face and Body Animation |
| FAP | Face Animation Parametre |
| FCC | Federal Communication Commission |
| FCD | Final Committee Draft |
| FDIS | Final Draft International Standard |
| FDP | Facial Definition Parametre |
| FDM | Frequency Division Multiplexing |
| FF | File Format |
| FGS | Fine Granularity Scalability |
| FIFO | First In First Out |
| FIPA | Foundation for Intelligent Physical Agents |
| FPA | Frame Packing Arrangement |
| FM | Frequency Modulation |
| FPS | Fast Packet Switching |
| FR | Functional Requirements |
| FTP | File Transfer Protocol |
| FTTC | Fiber to the Curb |
| GA | General Assembly |
| GIF | Graphics Interchange Format |
| GNU | Gnu’s Not Unix |
| GOB | Group of Block |
| GOP | Group of Pictures |
| GPL | General Public License |
| GPRS | General Packet Radio Services |
| GPU | General Postal Union |
| GSM | Global System for Mobile/Groupe Spécial Mobile |
| GUI | Graphical User Interface |
| HDLC | High-level Data Link Control |
| HD-MAC | High Definition MAC |
| HDR | High Dynamic Range |
| HDTV | High Definition Television |
| HEVC | High Efficiency Video Coding |
| HFC | Hibrid Fiber Coax |
| HoD | Head of Delegation |
| HTML | HyperText Markup Language |
| HTTP | HyperText Transport Protocol |
| HVXC | Harmonic Vector eXcitation Coding |
| IAB | Internet Activities Board |
| IAB | Internet Architecture Board |
| IC | Integrated Circuit |
| ICANN | Internet Corporation for Assigned Names and Numbers |
| ICASSP | International Conference on Acoustics, Speech and Signal Processing |
| ICCB | Internet Configuration Control Board |
| ICIP | International Conference on Image Processing |
| ICN | Information Centric Networking |
| ICT | Information and Communication Technologies |
| IDL | Interface Description Language |
| IEC | International Electrotechnical Commission |
| IESG | Internet Engineering Steering Group |
| IETF | Internet Engineering Task Force |
| IMS-1 | Interactive Multimedia Services at 1 Mbit/s |
| IMP | Interface Message Processor |
| INA | Institut National de l’Audiovisuel |
| IP | Internet Protocol |
| IP | Intellectual Property |
| IPI | Intellectual Property Identification |
| IPMP | Intellectual Property Management and Protection |
| IPMP-D | IPMP-Descriptors |
| IPMP-ES | IPMP-Elementary Streams |
| IPMP-H | IPMP Hooks |
| IPMP-S | IPMP-Systems |
| IPMP-X | IPMP eXtensions |
| IPR | Intellectual Property Rights |
| IS | International Standard |
| ISAN | International Standard Audiovisual Number |
| ISBN | International Standard Book Numbering |
| ISDB | Integrated Services Digital Broadcasting |
| ISDN | Integrated Service Digital Network |
| ISG | Implementation Studies Group |
| ISMA | Internet Streaming Media Association |
| ISO | International Organisation for Standardisation |
| ISP | Internet Service Providers |
| ISRC | International Standard Recording Code |
| ISSN | International Standard Serial Number |
| ISWC | International Standard Musical Work Code |
| IT | Information Technology |
| ITA | Industry Technical Agreement |
| ITSCJ | Information Technology Standards Committee of Japan |
| ITTF | Information Technology Task Force |
| ITU | International Telecommunication Union |
| ITU-R | International Telecommunication Union – Radiocommunication Sector |
| ITU-T | International Telecommunication Union – Telecommunication Sector |
| IVC | Internet Video Coding |
| IVICO | Integrated Video Codec |
| I/O | Input/Output |
| JADE | Java Agent Development Environment |
| JAXB | Java Architecture for XML Binding |
| JBIG | Joint BIlevel Experts Group |
| JCP | Java Community Process |
| JPEG | Joint ISO-CCITT Photographic Coding Experts Group |
| JSPA | Java Specification Agreement |
| JSR | Java Specification Request |
| JTC 1 | Joint ISO/IEC Technical Committee 1 |
| JVT | Joint Video Team |
| LAN | Local Area Network |
| LC | Low Complexity |
| LCM | Licensing Compliant Module |
| LD | Laser Disc |
| LGPL | Lesser General Public License |
| LOD | Level Of Detail |
| LP | Long Playing |
| LSB | Least Significant Bit |
| LSI | Large Scale Integration |
| M3W | Multimedia Middleware |
| M4IF | MPEG-4 Industry Forum |
| MAC | Multiplexed Analogue Components |
| MC | Management Committee |
| MC | Motion Compensation |
| MCO | Media Contract Ontology |
| MCU | MultiConference Unit |
| MDS | Multimedia Description Schemes |
| MHEG | Multimedia and Hypermedia Experts Group |
| MHP | Multimedia Home Platform |
| MIDI | Musical Instrument Digital Interface |
| MIME | Multipurpose Internet Mail Extensions |
| MIoT | Media Internet of Things |
| MIPS | Million Instructions Per Second |
| ML | Main Level |
| MLAF | Media Linking Application Format |
| HMI | Human-Machine Interaction |
| MMS | Multimedia Message Service |
| MMT | MPEG Media Transport |
| MOD | Media Object Decoder |
| MP | Main Profile |
| MP3 | MPEG-1 Audio Layer III |
| MP7A | MPEG-7 Alliance |
| MPEG | Moving Picture Experts Group |
| MPT | Ministry of Post and Telecommunication |
| MSB | Most Significant Bit |
| MS-DOS | Microsoft Disk Operating System |
| MSI | Medium Scale Integration |
| MTS | Message Transport System |
| MTU | Magnetic Tape Unit |
| MUSE | Multiple Sub-Nyquist Encoding |
| MUW | Multi User World |
| MW | Medium Wave |
| MXF | Material eXchange Format |
| MXM | MPEG eXtensible Middleware |
| NAB | National Association of Broadcasters |
| NASA | National Aeronautics and Space Administration |
| NB | National Body |
| NBC | Non-Backward Compatible |
| NI | Notification Information |
| NCP | Network Control Protocol |
| NP | New Project |
| NSF | National Science Foundation |
| NT | New Technology |
| NTSC | National Television System Committee |
| ODA | Open Document Architecture |
| OEM | Original Equipment Manufacturer |
| OMAF | Omnidirectional Media Application Format |
| OMG | Object Management Group |
| OPIMA | Open Platform Initiative for Multimedia Access |
| ORB | Object Request Broker |
| OS | Operating System |
| OSS | Open Source Software |
| OSF | Open Software Foundation |
| OSI | Open Software Initiative |
| OSI | Open System Interconnection |
| OSS | Open Source Software |
| OTA | Over The Air |
| OVM | OPIMA Virtual Machine |
| P2P | Peer-to-Peer |
| PA | Public Authority |
| PAL | Phase Alternating Lines |
| PAS | Publicly Available Specifications |
| PC | Personal Computers |
| PCB | Printed Circuit Board |
| PCM | Pulse Code Modulation |
| PCS | Picture Coding Symposium |
| PD | Portable Device |
| PDA | Personal Digital Assistant |
| PES | Packetised Elementary Streams |
| PIN | Personal Identification Number |
| PI | Publication Information |
| PK | Player Key |
| PN | Pseudo random Noise |
| PNG | Portable Network Graphics |
| PPD | Proposal Package Description |
| PS | Program Stream |
| PTS | Presentation Time Stamps |
| PTT | Post, Telephone and Telegraph |
| QAM | Quadrature Amplitude Modulation |
| QoS | Quality of Service |
| QPSK | Quadrature Phase Shift Keying |
| RA | Registration Authority |
| RACE | Research & development on Advanced Communication for Europe |
| RAM | Random Access Memory |
| RAND | Reasonable terms And Non Discriminatory conditions |
| RDD | Rights Data Dictionary |
| REL | Rights Expression Language |
| RFC | Request for Comments |
| RGB | Red Green and Blue |
| RI | Resource Information |
| RM | Reference Model |
| RMI | Remote Method Invocation |
| ROI | Return on Investments |
| RTI | Real-Time Interface |
| RTP | Real Time Protocol |
| SA | Structured Audio |
| SAC | Secure Authenticated Channel |
| SAOC | Spatial Audio Object Coding |
| SAPI | SOMMIT API |
| SB | Steering Board |
| SBC | Subband Coding |
| SC | Subcommittee |
| SC | Steering Committee |
| SCC | Screen Content Coding |
| SCART | Syndicat des Constructeurs d’Appareils Radio et Télévision |
| SCMS | Serial Copy Management System |
| SCR | Systems Clock Reference |
| SDM | System Decoder Model |
| SDMI | Secure Digital Music Initiative |
| SDO | Standards Developing Organisations |
| SDTV | Standard Definition Television |
| SEI | Supplemental Enhancement Information |
| SECAM | Séquentiel à Mémoire |
| SG | Study Group |
| SGML | Standard Generalised Markup Language |
| SI | Service Information |
| SI | Subscription Information |
| SIF | Source Input Format |
| SIGGRAPH | Special Interest Group on Computer Graphics |
| SIM | Subscriber Identification Module |
| SK | Service Key |
| SLPI | Software Library Portability Interface |
| SM | Simulation Model |
| SMIL | Synchronized Multimedia Integration Language |
| SMS | Short Message Service |
| SNHC | Synthetic and Natural Hybrid Coding |
| SNR | Signal-to-Noise Ratio |
| SOMMIT | Software Open Multi-Media Interactive Terminal |
| SMPTE | Society of Motion Pictures and Television Engineers |
| SP | Service Provider |
| SP | Signal Processing |
| SP | Simple Profile |
| SPAC | Strategic Planning Advisory Committee |
| SPS | Service Provider System |
| SRM | Session and Resource Manager |
| SSR | Scaleable Sampling Rate |
| SSS | Shared-Source Software |
| STB | Set Top Box |
| STC | Systems Time Clock |
| SUS | Service User System |
| STD | Systems Target Decoder |
| SVC | Scalable Video Coding |
| SVG | Simple Vector Graphics |
| SW | Short Wave |
| MW | Medium Wave |
| TC | Technical Committee |
| TCK | Technology Compatibility Kit |
| TCP | Transmission-Control Protocol |
| TDM | Time Division Multiplexing |
| TDMA | Time Division Multiple Access |
| TINA | Telecommunication Information Networking Architecture |
| TK | Title Key |
| TLD | Top Level Domain |
| TM | Technical Module |
| TM | Test Model |
| TPM | Technological Protection Measure |
| TR | Technical Report |
| TS | Time Slot |
| TS | Transport Stream |
| TT | Timed Text |
| TTS | Text-To-Speech |
| TTSI | TTS Interface |
| TVA | TV Anytime Forum |
| UD | User Description |
| UDP | User Datagram Protocol |
| UHF | Ultra High Frequency |
| UK | User Key |
| UPU | Universal Postal Union |
| URI | Uniform Resource Identifiers |
| URL | Universal Resource Location |
| USAC | Unified Speech and Audio Coding |
| VADIS | Video Audio Digital Interactive System |
| VBV | Video Buffering Verifier |
| VCD | Video CD |
| VCEG | Video Coding Experts Group |
| VCR | Video Cassette Recorder |
| VGA | Video Graphic Adaptor |
| VHF | Very High Frequency |
| VHS | Vertical Helix Scan |
| VLC | Variable Length Coding |
| VLSI | Very Large Scale Integration |
| VM | Verification Model |
| VM | Virtual Machine |
| VO | Video Object |
| VOP | Video Object Plane |
| VOD | Video on Demand |
| VRML | Virtual Reality Modeling Language |
| VSB | Vestigial Side Band |
| W3C | World Wide Web Consortium |
| W-CDMA | Wideband-CDMA |
| WD | Working Draft |
| WG | Working Group |
| WIPO | World Intellectual Property Organisation |
| WWW | World Wide Web |
| WYSIWYG | What You See Is What You Get |
| VT | Verification Tests |
| XM | eXperimentation Model |
| XML | eXtensible Markup Language |
| XMT | eXtensible MPEG-4 Textual format |
| XSL | eXtensible Style Language |
| YM | sYstem Model |
| YMCK | Yellow, Magenta, Cyan and blacK |