| 3DES | Triple Data Encryption Standard |
| AALn | ATM Adaptation Layer n |
| AAC | Advanced Audio Coding ”in the context of MPEG |
| AAF | Advanced Authoring Format |
| AC3 | Audio Compression 3 used by ATSC |
| ADC | Analog to Digital Converter |
| ADPCM | Adaptive Differential Pulse Code Modulation |
| ADSL | Asymmetric Digital Subscriber Line |
| AES | Authority and Format Identifier ”in the context of DSM-CC NSAP address |
| AFI | Advanced Encryption Standard |
| AGC | Automatic Gain Control |
| AIR | Application Information Resource ”in the context of cable HOST-POD interface |
| AIT | Application Information Table ”in the context of MHP |
| AEE | Application Execution Environment |
| API | Application Interface |
| AEIT | Aggregate Event Information Table used by cable systems' EPG |
| ADET | Aggregate Data Event Table used by cable systems' EPG |
| ANSI | American National Standards Institute |
| ATSC | Advanced Television Systems Committee |
| ATVEF | Advanced Television Enhancement Forum |
| ARIB | Association of Radio Industries and Businesses |
| ASCII | American Standard Code for Information Interchange |
| ASF | Advanced (formerly Active) Streaming Format (Microsoft's MPEG-based AVI successor) |
| ASN | Abstract Syntax Notation ”used in the context of X.509 certificates, ASN.1/DER |
| ATM | Asynchronous Transfer Mode |
| AUX | Auxiliary |
| AV | Audio Video |
| AVI | Audio Video Interleaved |
| AWT | Abstract Windowing Toolkit |
| B2B | Business to Business |
| B2C | Business to Consumer |
| BFS | Broadcast File System |
| BGP | Border Gateway Protocol ”in the context of W3C |
| BIFF | Binary Interchange File Format ”in the context of MPEG-4 |
| BIOP | Basic Input Output Protocol ”in the context of CORBA, DSM-CC |
| BISDN | Broad- band Integration Services Digital Network |
| BML | Broadcast Markup Language ”in the context of ARIB |
| BMP | BitMaP ”in the context of Windows |
| bps | Bits per second |
| bslbf | bit serial, leftmost bit first |
| BTA | Broadcasting Technology Association in Japan |
| CA | Certificate Authority |
| CA | Conditional Access |
| CAT | Conditional Access Table ”in the context of MPEG PSI |
| CATV | Conditional Access TV |
| CCIR | Comite Consultatif International des Radiocommunications |
| CCITT | Comite Consultatif International de Telegraphique et Telephonique ”not ITU-T |
| CDA | Compact Disc Audio |
| CDATA | Character Data ”in the context of W3C DTD |
| CDR | Common Data Representation |
| CE | Consumer Electronics |
| CEA | Consumer Electronics Association |
| CERN | Conseil European pour la Recherch Nucleaire |
| CI | Common Interface |
| CLUT | Color Lookup Table |
| CMTS | Cable Modem Termination System |
| COFDM | Coded Orthogonal Frequency Division Multiplexing |
| COM | Common Object Model |
| CORBA | Common Object Request Broker Architecture |
| CPUI | Central Processing Unit |
| CRL | Certificate Revocation List |
| CRC | Cyclic Redundancy Check ”see Section 12.1.3.2 for the CRC algorithm. |
| CRID | Content Reference Identifier |
| CRL | Certificate Revocation List |
| CRLF | Carriage Return followed by a Line Feed |
| CRT | Cathode Ray Tube |
| CSRC | Contributing SouRCe ”in the context of RTP |
| CSS | Cascading Style Sheets |
| CTL | Certificate Trust List |
| CVCT | Cable Virtual Channel Table |
| CVID | Cinepak (Radius) ”in the context of video frame format |
| DAC | Digital to Analog Converter |
| DARPA | Defense Advanced Research Projects Agency |
| DASE | DTV Applications Software Environment |
| DAU | Data Access Unit ”in the context of MPEG |
| DAVIC | Digital Audio Visual Council |
| DCC | Directed Channel Change |
| DCD | Document Content Description ”in the context of W3C |
| DCM | Device Control Module ”in the context of HAVi |
| DCT | Discrete Cosine Transformation |
| DCCT | Discrete Channel Change Table |
| DDB | Download Data Block ”used in the context of DSM-CC |
| DDI | Data Driven Interaction |
| DDE | Declarative Data Essence |
| DEBn | Data Elementary Stream Buffer for synchronized data elementary stream n |
| DEBSn | Data Elementary Stream Buffer Size for synchronized data elementary stream n |
| DER | Definite Encoding Rules ”used in the context of X.509, ASN.1/DER |
| DES | Data Elementary Stream |
| DES | Data Encryption Standard |
| DET | Data Event Table |
| DECT | Digital Enhanced Cordless Telecommunications |
| DFT | Discrete Fourier Transform |
| DH | Diffie Hellman ”a cipher |
| DHCP | Dynamic Host Configuration Protocol |
| DHTML | Dynamic Hypertext Markup Language |
| DIB | Device Independent Bitmap ”in the context of Windows |
| DII | Download Info Indication ”used in the context of DSM-CC |
| DLP | Discrete Logarithm Problem ”in the context of the DH cipher |
| DMIF | DSM-CC Multimedia Integration Framework |
| DOCSIS | Data Over Cable Service Interface Specification |
| DOM | Document Object Model ”in the context of W3C |
| DTS | Decoding Time Stamp ”in the context of MPEG |
| DVB | Digital Video Broadcasting in Europe |
| DVR | Digital Video Recording |
| DPX | Digital Picture eXchange |
| DRM | Data Rights Management ”in the context of copyright protection |
| DSI | Data Service Initiate ”used in the context of DSM-CC |
| DSA | Digital Signature Algorithm |
| DSM | Digital Storage Media |
| DSM-CC | Digital Storage Media Command and Control |
| DSM-CC-OC | Digital Storage Media ”Command and Control Object Carousel |
| DSM-CC-UU | Digital Storage Media ”Command and Control User to User |
| DSS | Digital Signature Standard |
| DST | Data Service Table ”in the context of ATSC A90 |
| DTD | Document Type Definition ”in the context of W3C XML |
| DTS | Decoding Time-Stamp ”in the context of MPEG |
| DTV | Digital Television |
| DVB | Digital Video Broadcast |
| DVBSI | Digital Video Broadcast Service Information |
| DVD | Digital Video Disk |
| DVS | Digital Video Service |
| DWDM | Dense Wavelength Division Multiplexer |
| EBU | European Broadcasting Union |
| ECM | Entitlement Control Message |
| ECMA | European Computer Manufacturers Association |
| EDL | Edit Decision List |
| EE | Execution Engine |
| EFTA | European Free Trade Association |
| EKE | Encrypted Key Exchange |
| EIT | Event Information Table |
| EPG | Electronic Program Guide |
| ES | Elementary Stream ”in the context of MPEG |
| ESCR | Elementary Stream Clock Reference ”in the context of MPEG |
| ETM | Extended Text Message |
| ETT | Extended Text Table |
| ETSI | European Telecommunications Standards Institute |
| FDC | Forward Data Channel |
| FDDI | Fiber Distributed Data Interface |
| FIPS | Federal Information Processing Standard |
| FourCC | Four Character Code ”in the context of file type identifiers |
| FTP | File Transfer Protocol |
| FTTC | Fiber To The Curb |
| GCT | Global Color Table ”in the context of graphics file formats |
| GIF | Graphics Interchange Format |
| GSM | Global System for Mobile communications |
| GPS | Global Positioning System |
| GUI | Graphical User Interface |
| GXF | General eXchange Format |
| HAL | Hardware Abstraction Layer |
| HAVi | Home Audio Video interpretability |
| HD | High Definition |
| HDTV | High Definition Television |
| HFC | Hybrid Fiber Coax |
| HTML | Hypertext Markup Language |
| HTTP | Hyper Text Transport Protocol |
| HTTPS | Secure HTTP |
| IANA | Internet Assigned Numbers Authority ”in the context of W3C |
| IC | Integrated Circuits |
| ICAP | Interactive Communicating Application Protocol |
| ICC | International Color Consortium |
| IDEA | International Data Encryption Algorithm ”a cipher |
| IDL | Interface Definition Language |
| IEC | International Electrotechnical Commission |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| IF | Intermediate Frequency |
| IGMP | Internet Group Management Protocol ”in the context of IP multicast |
| IHDN | In-Home Digital Networks |
| IIOP | Internet Inter-ORB Protocol ”in the context of CORBA, DSM-CC |
| IHDN | In Home Digital Network |
| IOR | Interoperable Object Reference ”in the context of CORBA, DSM-CC |
| IP | Internet Protocol |
| IPPV | Impulse Pay Per View |
| IPR | Intellectual Property Rights |
| IPVBI | IP Multicast over VBI |
| IRD | Integrated Receiver Decoder |
| IS | Intensity Stereo ”in the context of MP3 |
| ISAN | International Standard Audiovisual Number |
| ISBN | International Standard Book Number |
| ISDN | Integrated Services Digital Network |
| ISO | International Organization for Standardization |
| ISP | Internet Service Provider |
| ITU | International Telecommunication Union |
| IWS | Initial Working Set ”in the context of iTV applications |
| JAR | Java Archive |
| JAAS | Java Authentication and Authorization Service |
| JCA | Java Cryptography Architecture |
| JCE | Java Cryptography Extensions |
| JCIC | Joint Committee on Intersociety Coordination |
| JDK | Java Development Kit |
| JFIF | JPEG File Interchange Format |
| JMF | Java Media Framework |
| JNG | JPEG Network Graphics |
| JNI | Java Native Interface |
| JNM | Java Native Methods |
| JPEG | Joint Picture Expert Group |
| JPG | An image file in the JPEG format |
| JS | Joint Stereo ”in the context of MP3 |
| JSSE | Java Secure Socket Extension |
| JVM | Java Virtual Machine |
| Kbps | Kilobits per second |
| KDF | Key Derivation Function |
| KLV | Key Length Value |
| LAN | Local Access Network |
| LBI | Late Binding Interface |
| LCD | Liquid Crystal Display |
| LID | Local Identifier |
| LISP | LIS Processing ”a programming language |
| LLC-SNAP | Logical Link Control “ Sub Network Access Protocol |
| LMDS | Local Multipoint Distribution System |
| LSD | Logical Screen Descriptor ”in the context of graphics file formats |
| LSF | Low Sampling Frequency ”in the context of MPEG AAC |
| MAC | Media Access Control ”used in the context of MPEG |
| MAC | Message Authentication Code ”used in the context of IP Security |
| MBGP | Multicast Border Gateway Protocol ”in the context of IP multicast |
| Mbps | Millions of bits per second |
| MD5 | Message Digest 5 |
| MDCT | Modified Discrete Cosine Transformation |
| MGT | Master Guide Table |
| MIDI | Musical Instrument Digital Interface (and file format) |
| MITRE | Missile Test and Readiness Equipment |
| MIME | Multipurpose Internet Mail Extensions |
| MHEG | Multimedia Hypermedia Expert Group |
| MHP | Multimedia Home Platform |
| MMDS | Multipoint Microwave Distribution System |
| MNG | Multiple image Network Graphics |
| MNGLC | Low-Complexity MNG |
| MOV | QuickTime MOVie format |
| MP3 | MPEG-1 Level 3 Audio |
| MPEG | Moving Picture Experts Group |
| MRD | MPEG-2 registration descriptor |
| MRLE | Microsoft Run Length Encoding |
| MSB | Most Significant Bit |
| MSDP | Multicast Source Directory Protocol ”in the context of IP multicast |
| MSO | Multiple (cable) System Owner |
| MTU | Maximum Transmission Unit |
| MUX | Multiplexer |
| MXF | Material eXchange Format |
| NAB | National Association of Broadcasters ”in the US |
| NAN | Not A Number |
| NABTS | North American Basic Teletext Specification (EIA-516) |
| NCTA | National Cable Television Association |
| NIC | Network Interface Card |
| NISDN | Narrow-band Integration Services Digital Network |
| NIST | National Institute of Standards and Technology |
| NPT | Normal Play Time |
| NRT | Network Resources Table ”in the context of ATSC A90 |
| NSAP | Network Service Access Point ”in the context of MPEG DSM-CC |
| NTSC | National Television System Committee |
| NTP | Network Time Protocol ”in the contest of W3C |
| NVOD | Near Video On Demand |
| OC | Object Carousel (DSM-CC) ”in the context of MPEG |
| OCAP | OpenCable Application Platform ”in the context of SCTE |
| ORB | Object Request Broker ”in the context of CORBA, DSM-CC |
| OS | Operating System |
| OSD | On Screen Display |
| OSGI | Open Systems Gateway Initiative |
| OSPF | Open Shortest Path First ”in the context of IP multicast routing |
| OUI | Organization Unique Identifier |
| PAL | Phase Alternation Line ”in the context of European TV broadcast format |
| PAM | Pulse Amplitude Modulation |
| PAT | Program Association Table |
| PCDATA | Parsed Character Data ”in the context of W3C DTD |
| PCM | Pulse Code Modulation |
| PCMCIA | Personal Computer Memory Card International Association |
| PCR | Program Clock Reference ”in the context of MPEG |
| PDA | Personal Digital Assistants |
| PDM | Pulse Duration Modulation |
| PE | Presentation Engine |
| PEM | Privacy Enhanced Mail |
| PES | Packetized Elementary Stream |
| PFR | Portable Font Resource |
| PID | Packet Identifier |
| PGP | Pretty Good Privacy ”a family of security software systems |
| PIM | Protocol Independent Multicase ”in the context of IP multicast |
| PIMDM | Protocol Independent Multicase Dense Mode ”in the context of IP multicast |
| PKI | Public Key Infrastructure |
| PKIX | PKI X.509 ”in the context of digital certificates |
| PLMN | Public Land Mobile Network |
| PMT | Program Map Table |
| PNG | Portable Network Graphics |
| POD | Point of Deployment |
| PPV | Pay Per View |
| PSI | Program Specific Information |
| PSI | Program Specific Information ”in the context of MPEG |
| PSIP | Program and System Information Protocol |
| PSTD | Program System Target Decoder ”used in the context of MPEG buffer models |
| PSTN | Public Switched Telephone Network |
| PTS | Presentation Time Stamp |
| PU | Presentation Unit |
| PVR | Personal Video Recorder |
| QAM | Quadrature Amplitude Modulation |
| QoS | Quality of Service |
| QPSK | Quadrature Phase Shift Keying |
| RA | Registration Authority |
| RADIUS | Remote Authentication Dial-In Server/Service |
| RAM | Random Access Memory |
| RC | Remote Control |
| RDC | Reverse Data Channel |
| RDF | Resource Description Framework ”in the context of W3C |
| RDP | Remote Display Protocol |
| RFC | Request For Comments ”used in the context of W3C |
| RGB | Red Green Blue ”in the context of color model |
| RGBA | Red Green Blue Alpha ”in the context of color model |
| RIFF | Resource Interexchange File Format |
| ROM | Read Only Memory |
| RP | Rendezvous Point ”in the context of IP multicast routing |
| RPF | Reverse Path Forwarding ”in the context of IP multicast routing |
| RSA | Rivest Shamir Adelman ”a cipher |
| RSVP | Resource reSerVation Protocol |
| RTOS | Real-Time Operating System |
| RTP | Real-Time Protocol |
| RTCP | Real-Time Control Protocol |
| RTSP | Real-Time Streaming Protocol |
| RRT | Rating Region Table |
| SAP | Session Announcement Protocol ”in the context of IP multicast |
| SBNS | Satellite and Broadcast Network System |
| SCP | Service Control Protocol |
| SCR | System Clock Reference ”in the context of MPEG |
| SCSI | Small Computer System Interface |
| SCTE | Society of Cable Telecommunications Engineers |
| SD | Standard Definition |
| SDD | Self Describing Device |
| SDH | Synchronous Digital Hierarchy |
| SDF | Service Description Framework ”in the context of ATSC A90 |
| SDK | Software Development Kit |
| SDP | Session Description Protocol ”in the context of IP multicast |
| SDT | Service Description Table |
| SDTV | Standard Definition Television |
| SECAM | S quentiel Couleur Avec M moire ”a French Color TV Standard |
| SGML | Standard Generalized Markup Language |
| SGW | Service Gateway ”in the context of DSM-CC |
| SHA1 | Secure Hashing Algorithm 1 |
| SI | System Information |
| SIP | Session Invitation Protocol |
| SMATV | Satellite Master-Antenna Television |
| SMDS | Switched Multimegabit Data Service |
| SMIL | Synchronized Multimedia Integration Language |
| SMPTE | Society of Motion Picture and Television Engineers |
| SMS | Short Message Service ”in the context of the cellular industry |
| SMS | Subscriber Management System ”in the context of cable systems |
| SMTP | Simple Mail Transfer Protocol ”Internet email |
| SMTV | Satellite Master Antenna Television |
| SONETS | Synchronous Optical NETwork |
| SPT | Shortest Path Tree ”in the context of IP multicast routing |
| SRM | Session Resource Manager |
| SSL | Secure Socket Layer |
| SSRC | Synchronization SouRCe ”in the context of RTP |
| STB | Set Top Box |
| STC | System Time Clock |
| STD | System Target Decoder |
| STLP | Secure Transport Layer Protocol |
| STT | System Time Table ”in the context of PSIP |
| STV | Subscription TV |
| SVC | Switched Virtual Circuits |
| SVG | Switched Vector Graphics |
| TAP | Transport Access Partition |
| TBn | Transport Buffer for data elementary stream n |
| TBSn | Transport Buffer Size for data elementary stream n |
| TCP | Transmission Control Protocol |
| TCP /IP | Transmission Control Protocol/Internet Protocol |
| TFS | Transport File System |
| TFTP | Trivial FTP |
| TNS | Temporal Noise Shaping ”in the context of MP3 |
| TLS | Transport Layer Security |
| TS | Transport Stream |
| TSFS | Transport Stream File System |
| TSID | Transport Stream Identifier |
| TSTD | Transport System Target Decoder ”used in the context of MPEG buffer models |
| TTL | Time To Live ”in the context of W3C |
| TVCT | Terrestrial Virtual Channel Table |
| UART | Universal Asynchronous Receiver/Transmitter |
| UCS | Universal Multiple-Octet Coded Character Set |
| UDP | User Datagram Protocol |
| UHTTP | Unidirectional Hyper Text Transport Protocol |
| UI | User Interface |
| UMID | Universal Material Identifiers |
| URI | Uniform Resource Identifier |
| URN | Uniform Resource Name |
| URL | Uniform Resource Locator |
| UTF | UCS Transformation Coding |
| UTC | Coordinated Universal Time1 |
| UU | User to User (DSM-CC Object Carousel) |
| UUID | Universally Unique ID |
| uimsbf | Unsigned Integer, Most Significant Bit First |
| VBI | Vertical Blanking Interval |
| VCT | Virtual Channel Table |
| VCR | Videocassette Recorder |
| VM | Virtual Machine |
| VOD | Video On Demand |
| VQ | Vector Quantization |
| VSB | Vestigial Side Band |
| W3C | World Wide Web (WWW) Consortium |
| WAE | Wireless Applications Environment |
| WAP | Wireless APplications |
| WAN | Wide Area Network |
| WAV | Wave file format ”in the context of Windows audio files |
| WDP | Wireless Datagram Protocol |
| WML | Wireless Markup Language |
| WSP | Wireless Session Protocol |
| WST | World System TeleText (PAL television captioning and data standard) |
| WTLS | Wireless Transport Layer Security |
| WTP | Wireless Transaction Protocol |
| X509 | A standard for Certificates and Certificate Revocation Lists, RFC 3280 |
| XAIT | eXtensible Application Information Table ”in the context of MHP |
| XDML | eXtensible DTV Markup Language |
| XHTML | eXtensible Hypertext Markup Language |
| XML | eXtensible Markup Language |
| XMLDSIG | XML Digital Signatures |
| XPath | XML Path Language |
| XQL | XML Query Language |
| XSD | XML Schema Definition ”in the context of W3C |
| XSL | eXtensible Stylesheet Language ”in the context of W3C; usually refers to XSLT |
| XSLT | eXtensible Stylesheet Language Transformations ”in the context of W3C |
| ZIP | Compression and archiving file format |
