Technology Glossary


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  • JSRA
    Joint Sponsored Research Agreement
  • JUL
    July
  • Julian Calendar
    a method of specifying the date by the number of days which have passed since the first day of January...
  • JUN
    June
  • K band
    A portion of the electromagnetic spectrum in the microwave region of frequencies ranging between 12 and 93 gigahertz (GHz). The...
  • Key Source
    a source which is central to the dissemination of emergency alerts and information, such as an NP, SP, SR, or...
  • Keyboard
    a device similar to a typewriter that is used to enter information and instructions into the computer. In addition to...
  • KG
    Kilogram
  • kHz
    kilohertz
  • Kilobyte Kb
    In decimal systems kilo stands for 1,000, but in binary systems a kilo is 1,024 (2 to the 10th power)....
  • kinetic energy
    temperature of gases causes an increase in the amount of energy in the gas.
  • KLM
    Royal Dutch Airlines
  • km
    Kilometer
  • Knot
    A speed of one nautical mile per hour.
  • KT
    Knots
  • Ku band
    Most popular type of satellite transmission for uplinking and downlinking. Ku-band operates on a higher frequency than C-band transmissions and...
  • kW
    Kilowatt
  • L
    Left
  • L band
    A frequency between 390 MHz and 1.55 GHz which is used for satellite communications and for terrestrial communications between satellite...
  • LAN
    Local Area Network. Integration of computer and communication systems that wire computers, peripheral equipment and telephones together so they can...
  • LAN
    See Local Area Network.
  • LAN Local Area Network
    Communications network connecting computers by wire, cable, or fiber optics link. Usually serves parts of an organization located close to...
  • LAND MOBILE SERVICE
    A public or private radio service providing two-way communication, paging and radio signaling on land.
  • LAND MOBILE SERVICE
    A public or private radio service providing two-way communication, paging and radio signaling on land.
  • Land Mobile Service
    A public or private radio service providing two-way communication, paging and radio signaling on land.
  • LANDLINE
    Traditional wired phone service.
  • LANDLINE
    Traditional wired phone service.
  • LASER
    Light Amplification by Stimulated Emission of Radiation.
  • laser Light Amplification by Stimulated Emission of Radiation
    A device for producing light by emission of energy stored in a molecular or atomic system when stimulated by an...
  • LAT
    Latitude
  • LATA
    Local access and transport area. Geographic region set up to differentiate local and long distance calls; the area where...
  • Latitude
    An angular measurement of a point on the earth, north or south of the equator. Latitude is 0 degrees at...
  • LAX
    Identifier for Los Angeles
  • LCN
    Local Communications Network.
  • LDGPS
    Local DGPS
  • LEC
    Local Exchange Carrier, the local or regional telephone company that owns and operates lines to customer locationas and central office...
  • LECC Communications Operations Order
    Each Local Emergency Communications Committee must write and distribute numbered Communications Operations Orders, as required, to provide specific instructions to...
  • LECC Local Emergency Communications Committee
    A committee of the Federal Communications Commission. The LECC is what was formerly called the Operational Area Emergency Communications Communications...
  • LED
    Light Emitting Diode. A semiconductor that emits light.
  • Legion
    "a worldwide virtual computer." U. Virginia object-based metasystem, aims to make "millions of hosts and trillions of data objects" appear...
  • LFR
    Low-frequency Radio Range
  • LGS
    Landsat Ground Station, Sioux Falls S.D.
  • Lifeline Link Up Services
    Programs that help qualify low-income households afford local telephone service. Lifeline assists with monthly telephone bills and Link-Up assists with...
  • lift
    A force that pushes an object up. The lift is created by the wings of a plane.
  • Light Guide
    An optical fiber bundle.
  • light transmitted
    Light that has traveled through a medium without being absorbed or scattered.
  • LIM
    Limit
  • line scanner
    A scanning radiometer which by use of a rotating or oscillating plane mirror can scan a path normal to the...
  • linear quantizing
    The range of grey shades from maximum to minimum is divided into contiguous intervals, each of equal length, and each...
  • linear spatial filter
    A spatial filter for which the grey shade assignment at coordinates (x, y) in the transformed image is made by...
  • Links
    A graphic, line of text, or both on a Web page that connects to another page on the same Web...
  • List Server
    A list server is a device that operates mailing lists and distributes new messages, newsletters, or other postings from list...
  • ListServ
    Mailing list program for communicating with other people who have subscribed to the same list. Using E-mail, you can participate...
  • LMM
    Compass locator at the middle marker
  • LNAV
    Lateral Navigation (provides computer description of aircraft's planned lateral flight path that can be tracked by the autoflight system; lateral...
  • LO
    Low
  • LOC
    Localizer Beam
  • Local Access and Transport Area LATA
    A contiguous local exchange area which includes every point served by a local phone company within an existing community of...
  • Local Area
    An FCC Local Area consists of at least one county and may consist of several counties or parts of counties....
  • Local Area Network LAN
    A linkage of computers and/or peripherals (e.g., printer) confined to a limited area that may consist of a room, building,...
  • Local area network LAN
    the linkage of computers and/or peripherals (e.g., printer) confined to a limited area that may consist of a room, building...
  • LOCAL AREA NETWORK LAN
    Intraoffice communication system usually used to provide data transmission in addition to voice transmission.
  • Local Multipoint Distribution Services LMDS
    This is a point/multipoint service with two-way capability to transmit voice, data, and other video information. LMDS can offer innovative...
  • Location Code
    an ASCII code in the EAS headers that specifies the location of an emergency utilizing the five character FIPS code...
  • LOE
    Line Oriented Evaluation
  • LOFT
    Line Oriented Flight Training
  • Log on
    to connect to a computer or network, usually through the entry of an acceptable user ID and password (i.e., through...
  • Logging On
    Connecting to a computer network, typically through the use of a personalized identification code.
  • LOM
    Compass Locator at the Outer Marker
  • LON
    Longitude
  • Longitude
    The angular measurement of a point on the earth's surface, east or west of the prime meridian. The prime meridian...
  • Longitudinal Shield
    A tape shield, flat or corrugated, applied lengthwise with the axis of the core being shielded.
  • lookup table
    A file of values from which functions corresponding to a given argument can be obtained. A table lookup procedure is...
  • Loose Tube
    A protective tube loosely surrounding fiber strands. The tube may be filled with gel to protect against moisture infiltration.
  • LORAN
    Long Range Navigation
  • LOS
    Line-Oriented Simulation
  • Loss
    Attenuation of an optical or electrical signal, normally measure in decibels
  • Loss Budget
    An accounting of overall attenuation in a system. The budget is the amount of acceptable loss.
  • Lottery random selection
    In this context, an alternative method to auctions and comparative hearings for al-locating spectrum space to competing applicants in various...
  • LOW POWER FM RADIO LPFM
    A broadcast service that permits the licensing of 50-100 watt FM radio stations within a service radius of up to...
  • LOW POWER FM RADIO LPFM
    A broadcast service that permits the licensing of 50-100 watt FM radio stations within a service radius of up to...
  • LOW POWER TELEVISION LPTV
    A broadcast service that permits program origination, subscription service or both via low powered television translators. LPTV service includes the...
  • Low Power Television LPTV
    a television signal translator station which also originates programming.
  • LOW POWER TELEVISION LPTV
    A broadcast service that permits program origination, subscription service or both via low powered television translators. LPTV service includes the...
  • Low Power Television Service LPTV
    A broadcast service that permits program origination, subscription service, or both via low powered television translators. Low Power Television service...
  • LP
    Local Primary. A local area EAS station. Every area shall have an LP1 (the primary) and an LP2 (the secondary...
  • LPS
    Landsat Processing System
  • LRC
    Long Range Cruise
  • LRU
    Line Replaceable Unit
  • LVL CHG
    Level Change
  • M
    Mach Number
  • M
    Manual Tuned NAVAID
  • M and E
    Music and effects
  • M ASI
    Mach/Airspeed Indicator
  • MAA
    Maximum Authorized IFR Altitude
  • MAC
    Media Access Control. A portion of the Ethernet frame.
  • mach number
    a number that identifies the speed of an airplane by the number of times faster than the speed of...
  • MAG
    Magnetic
  • Mainframe computer
    a large computer that supports many users and has the storage and computing capacity needed for large data sets. It...
  • Mainframe Computer
    A large relatively complex computer. Its capacity far exceeds that of the microcomputer.

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