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ME Consultancy are proud to be BT's Growth Partner of The Year 2003-2004
| I/N | Interference to Noise Ratio |
| I/Q | Inphase-Quadrature |
| IAAB | Inter-American Association of Broadcasters |
| IAB | International Association of Broadcasting |
| IABM | International Association of Broadcast Manufacturers |
| IAC | Industry Advisory Committee (to FCC or other agency) |
| IAC | Internet Access Coalition |
| IATSE | International Alliance of Theatrical Stage Employees |
| IB | FCC International Bureau |
| IB | In Band |
| IBA | Independent Broadcasting Authority (England) |
| IBAC | In-Band, Adjacent Channel |
| IBC | International Broadcast Convention |
| IBEW | International Brotherhood of Electrical Workers |
| IBFS | International Bureau Filing System (at FCC) |
| IBI | In-Band, Interstitial (for DAB sharing in FM band) |
| IBO | International Broadcasting Organization |
| IBOC | In-Band, On-Channel (for DAB sharing in FM band) |
| IBRC | In-Band, Reserved Channel |
| IBRD | International Bank for Reconstruction & Development |
| IBS | Intercollegiate Broadcasting System |
| IBTO | International Broadcasting & Television Organization |
| ICA | International Communications Association |
| ICAO | International Civil Aviation Organization |
| ICBA | International Cellular Vision Association |
| ICC | Internet Content Coalition |
| ICE | International Consortium on Engineering |
| ICIA | International Communications Industries Association |
| ICO | Intermediate Circular Orbit (Communications Satellites) |
| ICPM | Incidental Carrier Phase Modulation |
| ICR | Inter-City Relay Station |
| ICTA | Independent Cable & Television Association |
| ICTV | Independent Community Television Alliance |
| ID | Station identification |
| IDLC | Integrated Digital Logic Circuit |
| IDN | Integrated Digital Network |
| IDRA | International Digital Radio Association |
| IDTV | Improved Definition Television |
| IEC | International Electrotechnical Commission |
| IEE | Institution of Electrical Engineers (United Kingdom) |
| IEEE | Institute of Electrical & Electronics Engineers |
| IETF | Internet Engineering Task Force |
| IEV | International Electrotechnical Vocabulary |
| IFAST | International Forum on AMPS Standards Technology |
| IFB | Interruptable fold-back for SNG circuits |
| IFFT | Inverse Fast Fourier Transform |
| IFIP | International Federation for Information Processing |
| IFPI | International Federation of Phonogram & Videogram Producers |
| IFRB | International Frequency Registration Board (ITU obsolete) |
| IFTC | International Film & Television Council |
| IHF | Institute of High Fidelity (merged into EIA) |
| IIPA | International Intellectual Property Alliance |
| IISP | Information Infrastructure Standards Panel |
| IITF | Information Infrastructure Task Force |
| ILEC | Incumbent Local Exchange Carrier |
| IM | Intermodulation |
| IMA | Interactive Multimedia Association |
| IMC | IMSI Management Council |
| IMD | Intermodulation Distortion |
| IMEI | International Mobile Equipment Identity |
| IMF | IMSI Management Forum |
| IMF | International Monetary Fund |
| IMO | International Maritime Organization |
| IMPA | Independent Music Producers Association |
| IMS | Intersystem Messaging Security |
| IMSF | Intersystem Messaging Security Forum |
| IMSI | International Mobile Subscriber Identity |
| IMSI | International Mobile Station Identity |
| IMT | International Mobile Telecommunications |
| IMT-2000 | International Mobile Telecommunications 2000 (formerly FPLMTS) |
| IMUX | Inverse Multiplexing |
| INAP | Intelligent Networks Application Protocols |
| INMARSAT | International Maritime Satellite Organization |
| INTELSAT | International Telecommunications Satellite Organization |
| INTSC | Improved NTSC Television |
| INTUG | International Telecommunications Users Group |
| INTV | Association of Independent Television Stations |
| IOT | Inductive Output Tube |
| IP | Information Providers |
| IP | Internet Protocol |
| IP | Intelligent Peripheral |
| IPA | Intermediate Power Amplifier |
| IPO | Initial Public Offering |
| IPPV | Impulse Pay Per View |
| IPR | Intellectual Property Right(s) |
| IPS | Inches per Second (linear recording tape speed) |
| IPTC | International Press Telecommunications Council |
| IRAC | Interdepartmental Radio Advisory Committee |
| IRD | Integrated Receiver Decoder (for satellite TV reception) |
| IrDA | The Infrared Data Association |
| IRE | Institute of Radio Engineers (now IEEE) |
| IRPA | International Radiation Protection Association |
| IRS | Insertion Reference Signals (for auto video processing) |
| IRS | Information Receiving Station |
| IRTF | International Radio & Television Foundation |
| IRTS | International Radio & Television Society |
| IS | Interm Standard |
| ISA | Intermodulation Spurious Response Attenuation |
| ISA | Interactive Services Association (formerly VIA) |
| ISCET | International Society of Certified Electronics Technicians |
| ISD | International Standards Development |
| ISDB | Integrated Services Digital Broadcasting |
| ISDN | Integrated Services Digital Network |
| ISDN | Integrated Services Digital Network |
| ISI | InterSymbol Interference (in digital transmission systems) |
| ISL | Inter-satellite Link |
| ISM | Industrial, Scientific & Medical (devises using radio energy |
| ISM | Interactive Storage Media (as optical discs) |
| ISN | International Sunspot Number (For HF Propagation Predictions) |
| ISO | International Satellite Organization |
| ISO | International Organization for Standardization |
| ISOC | Internet Society |
| ISOG | International Satellite Operators Group |
| ISP | Internet Service Provider |
| ISPC | International Sound Program Center (European) |
| ISRC | International Standard Recording Code (code on CD's) |
| ISS | Inter-Satellite Service |
| ITA | Interactive Television Association |
| ITA | Industrial Telecommunications Association |
| ITA | Independent Television Authority (England) |
| ITAA | Information Technology Association of America |
| ITAC | International Telecommunications Advisory Committee (State Dept.) |
| ITAR | International Traffic in Arms Regulations |
| ITC | International Trade Commission |
| ITC | International Television Center (European) |
| ITC | Independent Television Commission (UK) |
| ITCA | International Teleconferencing Association |
| ITE | Information Technology Equipment |
| ITFS | Instructional Television Fixed Service |
| ITNA | Independent Television News Association |
| ITO | Intermediate Transfer Orbit (satellites) |
| ITPC | International Television Program Center (European) |
| ITS | Intelligent Transportation Systems |
| ITS | Institute of Telecommunication Sciences (div. of NTIA) |
| ITS | Inserted Test Signals (in the video signal) |
| ITS | Intelligent Transportation System |
| ITS | International Teleproduction Society |
| ITS America | Intelligent Transport System in the US |
| ITTA | Independent Telephone & Telecommunications Alliance |
| ITU | International Telecommunication Union |
| ITU-D | International Telecommunications Union Development Sector |
| ITU-R | ITU Radiocommuncations Standardization Sector |
| ITU-R | International Telecommunications Union Radiocommuncation Sector |
| ITU-T | International Telecommunication Union Telecom. Standard. Sector |
| ITU-T | ITU Telecommunications Standardization Sector |
| ITV | Industrial/International Television |
| ITVA | International Television Association |
| ITVB | International Television Broadcast/Broadcasting |
| ITVS | Independent Television Service |
| IVDS | Interactive Video Data Service |
| IVHS | Inter-Vehicle Homing System |
| IVHS | Intelligent Vehicle Highway Systems |
| IVS | Integrated Video Services |
| IWF | Inter-Working Functionality |
| IWF | Interworking Function |
| IWG | Informal Working Group |
| IX | Interference (to radio communications circuits) |