Technology Glossary


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  • Multispectral Scanner MSS
    (1) A non-photographic imaging system, which utilizes an oscillating mirror and fiber optic sensor array. The mirror sweeps from side...
  • Multitasking
    the concurrent execution of several jobs.
  • MUST CARRY
    (Retransmission) - A 1992 Cable Act term requiring a cable system to carry signals of both commercial and noncommercial television...
  • Must Carry retransmission
    A term from the 1992 Cable Act, it refers to a cable system
  • MUX
    Abbreviation for Multiplexer
  • MWP
    Meteorological Weather Processor
  • N
    North
  • N A
    Not Applicable
  • NACA
    National Advisory Committee for Aeronautics
  • NADIN II
    National Airspace Data Interchange Network II (the national digital message switching network for aeronautical data)
  • nadir
    That point on the celestial sphere vertically below the observer (i.e. the point on the Earth directly below an orbiting...
  • NAED
    National Association of Electrical Distributors.
  • Nanometer
    A unit of measurement, 10-9 meters. Light wave frequencies are stated in nanometers.
  • NAPE
    National Association of Power Engineers.
  • Narration
    The voice-over on the video. The script will note whether the narration is in English or another language and will...
  • Narrowband
    A term applied to telecommunications facilities capable of carrying only voice, facsimile images, slow-scan video images and data transmissions at...
  • Narrowcasting
    The delivery of cable programming to a small community or audience where that programming addresses the audience
  • NAS
    National Airspace System
  • NAS
    National Aircraft Standard
  • NASA
    National Aeronautics and Space Administration
  • Nat Sound
    Natural sound
  • NATCA
    National Air Traffic Controllers Association
  • National Control Point Procedures
    those national EAS procedures used only by national networks and program suppliers.
  • National Information Center NIC
    a source of official federal government information.
  • National Information Infrastructure NII
    The NII refers to a nationwide network of integrated telecommunications that connects people, businesses, schools, institutions and governments with one...
  • National Periodic Test NPT
    tests of National Primary sources.
  • National Television Standards Committee NTSC
    A television industry group that develops standards for television broadcasting and receiving equipment in the United States.
  • Nationwide Statewide Cost Averaging
    A method of averaging costs to establish uniform prices for telephone service so that subscribers using more costly-to-serve, lightly-trafficked...
  • Nautical Mile
    A distance of 6076.11549 feet which is one minute of arc of a great circle of the Earth.
  • NAV
    Navigation
  • NAVAID
    Navigational Aid
  • NBAA
    National Business Aircraft Association
  • ND
    Navigation Display
  • NDB
    Nondirectional Radio Beacon
  • NDVI
    Normalized Difference Vegetation Index. NDVI is the most commonly used vegetation index for satellite imagery. The difference in reflectance from...
  • near infrared NIR
    The preferred term for the shorter wavelengths in the infrared region (the entire infrared region extends from about 0.7
  • NEC
    National Electric Code. A standard published by the National Fire Protection Association (NFPA) and incorporated in OSHA (Occupational Safety and...
  • NECA
    National Electrical Contractors Association.
  • Needs Assessment
    A "needs assessment" is a process for determining the desired functions for computer and networking technology and/or determining the needs...
  • Needs assessment
    an evaluation of the functions you want your computer and networking technology to have or the needs you hope this...
  • Needs statement
    a description of the functional needs, technical requirements and security and ethical standards that need to be met by a...
  • NEMA
    National Electrical Manufacturers Association.
  • NESDIS
    National Environmental Satellite, Data, and Information Service
  • net thrus
    The effective thrust developed by the engine during the flight, taking into consideration the initial momentum of the aircraft speed...
  • Netiquette
    Network + etiquette= netiquette. Customs and socially accepted behavior for using the Internet networks.
  • Netscape
    is one of the two most popular used Web browsers and also the name of a company, Netscape Communications, now...
  • Network
    A system of cables or wireless pathways that link communication nodes.
  • NETWORK
    Any connection of two or more computers that enables them to communicate. Networks may include transmission devices, servers, cables, routers...
  • Network
    A group of computers connected to each other to share computer software, data, communications, and peripheral devices. Commonly, the definition...
  • Network
    a group of computers connected to each other to share computer software, data, communications and peripherals. Also, the hardware and...
  • Network
    A configuration of two or more computers linked to share information and resources.
  • NETWORK
    Any connection of two or more computers that enables them to communicate. Networks may include transmission devices, servers, cables, routers...
  • Network Networking
    A group of computers connected in any way that allows data to be sent among these computers.
  • News Group
    Discussion group on the Internet. Similar to electronic bulletin boards. Users are presented with a summary of discussion topics and...
  • NFPA
    National Fire Protection Association.
  • NGATM
    New Generation Air Traffic Manager
  • NIC
    Network Interface Card. This is the interface between a computer (or other device) and the Ethernet network.
  • Nile
    (calls itself "National Challenge Computing Project", not an acronym): 24 institutions including Cornell, UTexas, are using CORBA, widely distributed workstations...
  • NIST traceability
    The attempt to trace radiometric units and calibrations back to a common radiance source at the United States National Institute...
  • Nl
    Engine Revolutions per Minute (percent)
  • NLM
    Network Loadable Module
  • NLR
    National Research Laboratory (The Netherlands)
  • NM
    Nautical Mile
  • NMC
    National Meteorological Center
  • NN Non participating National
    an EAS source (usually a broadcast station) that has elected not to participate in the National-level EAS and removes its...
  • NOAA
    National Oceanic and Atmospheric Administration
  • NOAA National Oceanic and Atmospheric Administration
    Weather Service, one of the three federal agencies that participate in the EAS.
  • Node
    A communication point usually comprised of communication devices.
  • Node
    In a discussion of networks, a "node" refers to a processing location. A node can be a computer or some...
  • Node
    An origination or reception site.
  • noise
    Any unwanted disturbance affecting a measurement (as of a frequency band), especially that which degrades the information-bearing quality of the...
  • nominal
    (1) In name only; so-called. (2) Loosely, a rough designation or an approximation. (3) According to plan or design: a...
  • Non Duplication Rules
    Restrictions placed on cable television systems which prohibit them from importing distant programming that is simultaneously available locally.
  • nonsystematic distortion
    Geometric irregularities on images that are not constant and cannot be predicted from the characteristics of the imaging system. For...
  • NOTAM
    Notice for Airman
  • Notice of Inquiry NOI
    A Commission term, a Notice of Inquiry (NOI) is adopted by the Commissioners primarily for fact gathering, a way to...
  • Notice of Proposed Rulemaking NPRM
    A Notice of Proposed Rulemaking (NPRM) is adopted by the Commissioners to detail proposed changes to FCC rules and to...
  • NOV
    November
  • nozzle
    The nozzle is the exhaust duct of the engine. The energy depleted airflow that passed the turbine, in addition to...
  • NP National Primary
    A primary source of Presidential or other national EAS activations and programming, including broadcast stations involved with the PEP system...
  • NRECA
    National Rural Electric Cooperative Association.
  • NRP
    National Route Program
  • NRZ
    Non-Return-to-Zero. An electrical communication signal which uses a "low" signal for zero and a "high" signal for one. The electrical...
  • NTSB
    National Transportation Safety Board
  • NTSC
    National Television System Committee. Analog video broadcast standard used in North America.
  • NTSC
    National Television Systems Committee. The American engineering standard for horizontal video resolution lines, 525.
  • NUMBER PORTABILITY
    A term used to describe the capability of individuals, businesses and organizations to retain their existing telephone number(s)
  • NUMBER PORTABILITY
    A term used to describe the capability of individuals, businesses and organizations to retain their existing telephone number(s)
  • Number Portability
    Number portability is the term used to de-scribe capability of individuals, businesses, and organizations to retain their existing telephone number(s)...
  • NW
    Northwest Airlines
  • NWR NOAA Weather Radio
    a service of the National Weather Service that provides to a local area continuous broadcasts of the latest weather information...
  • NWS
    National Weather Service
  • NWS National Weather Service
    an operation of NOAA that is directly responsible for issuing local weather-related emergency alerts and Warnings in addition to day-to-day...
  • O D
    Outside diameter.
  • O QAR
    Optical Quick Access Recorder
  • OA Operational Area
    An Operational Area in California is a county. There are 58 counties in California. Some counties may be better served...
  • OAECC Operational Area Emergency Communications Committee
    Obsolete term. New term: LECC - Local Emergency Communications Committee of the FCC.
  • OAG
    Official Airline Guide
  • OAT
    Outside AirTemperature
  • OATS
    Orbit and Attitude Tracking

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