FICA Federal Insurance Contributions Act
FIDO Fog Investigation Dispersal Operation
FIFO First In First Out (as in registers and buffers)
FILO First In Last Out (see also FIFO)
FIMS Forms Interface Management System
FINE FINE Is Not Emacs
FIO Frequency In and Out
FIPS Federal Information Processing Standard
FIR Far InfraRed [Space]
FIR Finite Impulse Response
FIRMR Federal Information Resource Management Regulation
FIT Federal Information Technologies, inc.
FITS Flexible Image Transport System [Space]
FIX Federal Inter-agency eXchange [Networking]
FL Florida
FLACC Full Level Algol Checkout Compiler
FLEA Four Letter Extended Acronym
FLL Fixed Loss Loop [Telephony]
FLOP FLoating point OPeration
FLOPS FLoating-point OPerations per Second
FLRA Federal Labor Relations Authority
FM Frequency Modulation
FMB Federal Maritime Board
FMCS Federal Mediation and Conciliation Service
FMR Follow Me Roaming [Telephony]
FMS Financial Management Service (Treasury Dept) [US Government]
FMS Forms Management System
FNC Federal Networking Council (formerly FRICC) [US Government] (under OSTP)
FO Foreign Office
FO Forward Observer
FOAC Federal Office Automation Center
FOB Free On Board
FOB Full Of Bull (aperiodical of) [TMRC]
FOC Faint Object Camera (on HST) [Space]
FOC Free Of Charge
FOIA Freedom Of Information Act
FOIMS Field Office Information Management System
FOIRL Fiber Optic Inter(?) Repeater(?) Link(?) [Ethernet]
FOOBAR See FUBAR [Net jargon]
FOR Free On Rail
FORCS Faa's Operational Reporting Communication System
FORD Fix Or Repair Daily [Humor]
FORD Found On Road Dead [Humor]
FORTRAN FORmula TRANslator
FOS Faint Object Spectrograph (on HST) [Space]
FOSE Federal Office Systems Exposition
FOT Fiber Optic Transceiver [Ethernet]
FOT Free On Truck
FOV Field Of View
FPA Floating Point Accelerator
FPC Fish Protein Concentrate
FPE Floating Point Engine
FPHA Federal Public Housing Authority
FPLA Field Programmable Logic Array (see PLA)
FPM Feet Per Minute
FPO Field Post Office
FPO Fleet Post Office
fps Feet Per Second
FPU Floating Point Unit
FQDN Fully Qualified Domain Name [TCP/IP] (DNS)
FR Frame Relay [Telephony, Networking]
FRACTAL FRACTional dimensionAL
FRED Fred Resembles Emacs Deliberately
FRG Federal Republic of Germany (West Germany)
FRICC Federal Research Internet Coordinating Committee (now FNC, q.v.) [Networking, US Government]
FROG Free Rocket Over Ground
FRPG Fantasy Role Playing Game
FRS Federal Reserve System
FS Field Service
FS File System
FS Full Standard
FSF Free Software Foundation
FSK Frequency Shift Keying
FSLIC Federal Savings and Loan Insurance Corporation
FSS Federal Supply Service
FSW Forward Swept Wings
Ft Foot
FTAM File Transfer And Management (ISO upscale FTP)
FTC Federal Trade Commission
FTL Faster Than Light
FTP File Transfer Protocol (esp. of the TCP/IP suite)
FTS Federal Telecommunications System [Telephony, US Government]
FTS Flight Telerobotic Servicer [Space]
FUBAR F***ed Up Beyond All Recognition/Repair
FUBAR Fouled Up Beyond All Recognition/Repair
FUSE Far Ultraviolet Spectroscopic Explorer [Space]
FW Fringeworthy
FWD Front Wheel Drive
FWHM Full Width at Half Maximum [Space]
FX Foriegn eXchange [Telephony]
FY Fiscal Year
FYI For Your Information
G General audiences [Movie rating]
G Gravity
GA Gamblers Anonymous
GA General Assembly
GA General Average
GA General of the Army
GA Georgia
GAAP Generally Accepted Accounting Principles
GAB Group Audio Bridging [Telephony]
Gaia Earth's self-sustaining Biosphere (Not an acronym, from some ancient language, I think)
GAN Global Area Network
GAO General Accounting Office [US Government]
GAR Grand Army of the Republic
GARR Gruppo Arminizzazione Rete por la Ricerca (Italian Research Network Harmonization Group)
GAS Get-Away Special [Space]
GATT General Agreement on Tariffs and Trade
GAW Guaranteed Annual Wage
GAW Guarenteed Annual Wage
GB Gangbusters
GB GigaByte
GB Great Britain
GBIP General Purpose Interface Bus
GBT Green Bank Telescope [Space]
GC Garbage Collection (LISP)
GC Gas Chromatograph (or Chromatography)
GCA Ground Controlled Approach
GCC Gnu C Compiler
GCD Ground Controlled Descent
GCL Graphics Command Language
GCM General Court Martial
GCR Group-Coded Recording (magnetic tape, 6250 bpi)
GCT Greenwich Civil Time
GCVS General Catalog of Variable Stars [Space]
GDB Gnu DeBugger
GDP Gross Domestic Product
GDS Great Dark Spot [Space]
GE General Electric
GEM Giotto Extended Mission [Space]
GEM Graphics Environment Manager
GEO Geosynchronous Earth Orbit [Space]
GHQ General HeadQuarters
GHRS Goddard High Resolution Spectrograph (on HST) [Space]
GHz Giga HertZ (unit of frequency, 1,000,000,000 cycles per second)
GI Galvanized Iron
GI Gastro Intestinal (as in upper GI)
GI General Issue
GI Government Issue
GID Group ID [UNIX]
GIF Graphics Interchange Format
GIGO Garbage In Garbage Out
GIN Graphics INput
GISS Goddard Institute for Space Studies
GKS Graphical Kernel Standard
GKS Graphics Kernel System
GM Game Master
GM General Manager
GM General Motors [Corporate name, Automobile]
GM Guided Missile
GMBH Gesellschaft Mit Beschraenkter Haftung
GMC Giant Molecular Cloud [Space]
GMD Gesellschaft f\:ur Mathematik und Datenverarbeitung (German Institute for Mathematics and Data Processing)
GMRT Giant Meter-wave Radio Telescope [Space]
GMT Greenwich Mean Time (also called UT)
GNP Gross National Product
GNU GNU's Not Unix
GOES Geostationary Orbiting Environmental Satellite [Space]
GOES Geostationary Orbiting Environmental Satellites [Space]
GOSIP Government Open Systems Interconnection Profile (calls for government procurement of ISO/CCITT products)
GOSIP Government OSI Profile
GP General Practitioner
GP General Purpose (RR engines and origin of Jeep) [Railroading, Automobile]
GPC General Purpose Computer [Space]
GPI Graphics Programming Interface
GPIB General Purpose Interface Bus
GPIB General-Purpose Interface Bus
GPL GNU General Public Licence
GPO General Post Office
GPO Government Printing Office
GPS Global Positioning System
GPS Global Positioning System [Space]
GQ General Quarters
GRB Gamma Ray Burst(er)
GREP Global Regular Expression Print, g/re/p, (UNIX command)
GREP Global Regular Expression Print [UNIX]
GRO Gamma Ray Observatory [Space]
GRS Gamma Ray Spectrometer (on Mars Observer) [Space]
GRS Great Red Spot [Space]
GS General Schedule
GS Glide Slope
GSA General Services Administration
GSA General Services Adminstration [US Government]
GSA Girl Scouts of America
GSBCA General Services administration Board of Contract Appeals
GSC Guide Star Catalog (for HST) [Space]
GSFC Goddard Space Flight Center (Greenbelt, MD) [NASA, Space]
GSI Gesellschaft f\:ur Schwerionenforschung (German Federal Research Institute for Heavy Ion Research)
GSM Global System Mobile
GSM Groupe Speciale Mobile (Committee Designing preceding)
GSTS Ground-based Surveillance and Tracking System
GT Gross Ton
GTE General Telephone and Electric [Corporate name]
GTO Geostationary Transfer Orbit [Space]
GTSI Government Technology Services, inc.
GUI Graphical User Interface
GW Gamma World
GWEN Ground Wave Emergency Network
GWM Generic Window Manager [X]
H Harn
H Height
HACD Home Area Customer Dialing
HAL Heuristically programmed ALgorithmic computer (movie 2001)
HAM Hold And Modify
HAO High Altitude Observatory [Space]
Hb HemogloBin
HBM Her British Majesty; His British Majesty
HBO Home Box Office
HC Holy Communion
HC House of Commons
HCFA Health Care Financing Administration
HCFC hydrochlorofluorocarbon [Chemical]
HCL High Cost of Living
HD Hard Disk
HD Heavy Duty
HD Henry Draper catalog entry [Space]
HDA Head Disk Assembly (in winchester disk drives)
HDBV Host Data Base View
HDL High Density Lipoprotein
HDLC High-level Data Link Control [Networking]
HDTV High Definition Television
HE His Eminence
HE His Excellency
HEAO High Energy Astronomical Observatory [Space]
HEDM High Energy-Density Matter [Space]
HEMP Help End Marijuana Prohibition
HEO High Earth Orbit [Space]
HEPnet High Energy Physics network [Networking]
HERO Hazards of Electromagnetic Radiation to Ordnance
HF High Fantasy
HF High Frequency (3-30MHz)
HFE Human Factors Engineering
HFS Hierarchical File System
HGA High Gain Antenna [Space]
HHS (US Department of) Health and Human Services
HI Hawaii
HIIPS Hud Integrated Information Processing Services
HLC Heavy Lift Capability [Space]
HLL High-Level Language
HLV Heavy Lift Vehicle [Space]
HMC Halley Multicolor Camera (on Giotto) [Space]
HMOS High performance Metal Oxide Semiconductor (see MOS)
HMS His/Her Majesty's Ship
HMT His/Her Majesty's Transport
HNPA Home Numbering Plan Area [Telephony]
HOBIS HOtel Billing Information System
HOL High-Order System
HOTOL HOrizontal Take-Off and Landing
HP Hewlett Packard, Inc. [Corporate name]
HP High Pressure
HP Higher Power (sort of an AA "in" term, usually God)
HP Hit Points
HP HorsePower
HPGe High Purity Germanium
HPL/T High-Productivity Languages/Tools
HQ HeadQuarters
HR Hertzsprung-Russell (diagram) [Space]
HR House of Representatives
HRH Her Royal Highness
HRH His Royal Highness
HRI High Resolution Imager (on ROSAT) [Space]
HS High School
HSB Hue, Saturation, Brightness
HSP High Speed Photometer (on HST) [Space]
HST Hawaiian Standard Time
HST Hubble Space Telescope [Space]
HT High Tension (as in electric power transmission)
HTK Hits To Kill
HUAC House Unamerican Activities Committee
HUD Heads Up Display
HUD Housing and Urban Development [US Government]
HUPD Harvard University Police Department
HUT Hopkins Ultraviolet Telescope (ASTRO package) [Space]
HV High Voltage
HVAC Heating, Ventilation, and Air Conditioning
HW2000 Highway 2000
HWM High-Water Mark
Hz HertZ (unit of frequency, cycles per second)
IAB Internet Activities Board [Networking]
IAEA International Atomic Energy Agency
IANA Internet Assigned Numbers Authority (IANA@ISI.EDU)
IATA International Air Transport Association
IAU International Astronomical Union [Space]
IAUC IAU Circular [Space]
IBM Ingrained Batch Mentality
IBM International Business Machines, Inc. [Corporate name]
IBM Itty Bitty Machines
IBT Illinois Bell Telephone
IC Integrated Circuit
IC Interexchange Carrier [Telephony] (see also IEC, IXC)
ICB Interstate Computer Bank
ICBM InterContinental Ballistic Missile
ICE In-Circuit Emulator
ICE International Cometary Explorer [Space]
ICI Imperial Chemical Industries
ICJ International Court of Justice
ICL International Computers Ltd.
ICMP Internet Control Message Protocol
ICP Integrated Channel Processor
ICP Inventory Control Points
ICRC International Cosmic Ray Conference
ID Idaho
ID IDentification
IDA Intercommunication Data Areas
IDA International Dark-sky Association [Space]
IDA International Development Association
IDDD International Direct Distance Dial [Telephony]
IDE Interactive Development Environments, inc
IDF Intermediate Distributing Frame [Telephony]
IDL Interactive Data Language [Space]
IDV Interlibrational Derived Vehicle [Space]
i.e. ???? (Latin(?): in other words (?))
IE Indo-European
IEC Inter-Exchange Carrier [Telephony] (see also IC, IXC)
IEE Institute of Electrical Engineers [UK]
IEEE Institute of Electrical and Electronic Engineers
IETF Internet Engineering Task Force
IF Intermediate Frequency (as in IF stage)
IFB Invitation For Bids
IFC International Finance Corporation
IFC International Freighting Corporation
IFF Identification - Friend or Foe
IFF Interchange File Format
IFLA International Federation of Library Associations
IFR Instrument Flight Rules [Aviation]
IGES Initial Graphics Exchange Standard
IGM InterGalactic Medium [Space]
IGY International Geophysical Year
IGY International Geophysical Year [Space]
IHP Indicated HorsePower
IHS Integrated Hospital Support
IIA Information Industry Association
IIE Institute of Industrial Engineers
IIHF International Ice Hockey Federation
IIL Integrated Injection Logic
ILO International Labor Organization
ILS Instrument Landing System
ILV Industrial Launch Vehicle [Space]
IMF International Monetary Fund
IMHO In My Humble Opinion [Net jargon]
IMO In My Opinion [Net jargon]
IMP Interface Message Processor [ARPANET/MILNET] (replaced by PSN)
IMSL International Mathematical Subroutine Library
IN Indiana
INADS INitialization and ADministration System [Telephony]
INRA Iesus Nazerenus Rex Iudaeorum (Jesus of Nazareth, King of the Jews)
INRIA Institut National de Recherche en Informatique et Automatique
INS Immigration and Naturalization Service
In-situ In Place [Latin]
INSTITUTE INSTITUTE's Name Shows That It's Totally Unrelated To EMACS
INTAP INteroperability Technology Association for information Processing
INWATS INward Wide Area Telephone Service [Telephony]
I/O Input/Output
IO Input/Output (sometimes I/O)
IOC International Operating Center [Telephony, US]
IOD Identified Outward Dialing
IOOF International Order of Odd Fellows
IOTA Infrared-Optical Telescope Array [Space]
IOTA International Occultation Timing Association [Space]
IOU I Owe you(U)
IP Information Provider [Telephony]
IP Innings Pitched
IP Intermediate Point
IP Internet Protocol
IPC Inter-Process Communication
IPE Integrated Programming Environment
IPMS InterPersonal Message Services
IPS Inertial Pointing System [Space]
IPS Information Processing Standards
IPSE Integrated Project-Support Environment
IQ Intelligence Quotient (see EQ)
IR Index Register
IR Infra-Red
IRA Individual Retirement Account
IRA Irish Republican Army
IRAF Image Reduction and Analysis Facility [Space]
IRAS InfraRed Astronomical Satellite [Space]
IRBM Intermediate Range Ballistic Missile
IRDS Information Resource Dictionary Standard
IRDS InfraRed Detection Set
IRE Institute of Radio Engineers (old name for the now IEEE, which see)
IRM Information Resources Management
IRMS Information Resources Management Service
IRS Internal Revenue Service
IRTF Internet Research Task Force
IS Information Systems
IS International Standard [ISO] (Beyond the DIS Stage)
ISA Industry-Standard Architecture
ISAM Indexed Sequential Access Method
ISAS Institute of Space and Astronautical Science (Japan) [Space]
ISBD International Bibliographic Description
ISC Information Services Center
ISC International Switching Center
ISCH Interstitial-Cell-Stimulating Hormone (same as LH)
ISDN Integrated Services Digital Network [Telephony]
ISDT Integrated Systems Development Tool
ISEE International Sun Earth Explorer (usually ISEE-3)
ISF Information Systems Factory
ISFUG Integrated Software Federal User Group
ISI Information Sciences Institute
ISM InterStellar Medium [Space]
ISO Infrared Space Observatory [Space]
ISO International Organization for Standardization
ISO International Standards Organization [Space]
ISODE ISO Development Environment
ISOO Information Security Oversight Office
ISPM International Solar Polar Mission
ISPM International Solar Polar Mission (now Ulysses) [Space]
ISR Institute of Snow Research
ISRG Independent Space Research Group
ISV Independent Software Vendor
ISY International Space Year [Space]
IT Industrial Technology
IT Information Technology
ITC Inter-Task Communication
ITS Incompatible Timesharing System
ITT International Telephone and Telegraph
ITU International Telecommunications Union
ITUSA IT Users Standards Association
IUE International Ultraviolet Explorer [Space]
IUS Inertial Upper Stage
IUS Inertial Upper Stage [Space]
IUV Interlibrational Utility Vehicle [Space]
IXC Inter-eXchange Carrier [Telephony] (see also IC, IEC)
IXI International (pan-European) X.25 Infrastructure
JACM Journal of the Association for Computing Machinery
JANET Joint Academic Network (UK)
JBS John Birch Society
JC Jesus Christ
JC Joint Compound (plumbing)
JC Julius Caesar
JC Junior College
JCA Jewelry Crafts Association
JCAC Joint Civil Affairs Committee
JCAE Joint Committee on Atomic Energy
JCEE Joint Council on Economic Education
JCET Joint Council on Educational Television
JCS Joint Chiefs of Staff
JD Justice Department
JDS John Dewey Society
JEM Japanese Experiment Module (for SSF) [Space]
JES John Ericsson Society
JET Joint European Torus (fusion research)
JFK John F. Kennedy
JFK John F. Kennedy (international airport)
JFMIP Joint Financial Management Improvement Program
JGR Journal of Geophysical Research
JGR Journal of Geophysical Research [Space]
JI Justice, Inc.
JIC Joint Intelligence Center
JIC Just in Case
JILA Joint Institute for Laboratory Astrophysics [Space]
JIM Job Information Memorandum
JINTACCS Joint INteroperability of TActical Command and Control Systems
JIS Japan Industrial Standards
JISC Japanese Industrial Standards Committee
JIT Just In Time
JMS John Milton Society
JNT Joint Network Team (UK)
JO Job Order
JO Junior Officer
JOVE Jonathan's Own Version of Emacs
JOVIAL Jules Own Version of the International Algorithmic Language
JPL Jet Propulsion Laboratory
JPL Jet Propulsion Laboratory [Space]
JRC Junior Red Cross
JSC Johnson Space Center
JSC Johnson Space Center (NASA) [Space]
JSD Jackson System Development
JSRC Joint Services Review Committee
JTIDS Joint Tactical Information Distribution Systems
JV Junior Varsity
JvNC John von Neumann (Super Computer) Center
JvNCnet John von Neumann (Super Computer) Center network
K Kilo- (metric 1000)
K9 canine (K9 corps - army dogs)
KAIST Korean Advanced Institute of Science and Technology
KAO Kuiper Airborne Observatory [Space]
KB KiloByte
KC King's Counsel (QC when queen reigning)
KC Knights of Columbus
KD Kiln Dried
KD Knocked Down
KDCI Key Display Call Indicator
KERMIT Kl-10 Error-free Reciprocal Micro Interconnect over Tty lines
KET Kentucky Educational Television
KHz Kilo HertZ (unit of frequency, 1000 cycles per second)
KI Kiwanis International
KIA Killed In Action
KIAS Knot Indicated Air Speed
Km Kilometers
KO Knock Out [Boxing, Electric]
KP Key Pulse [Telephony]
KP Kitchen Police
KPNO Kitt Peak National Observatory
KPO KeyPunch Operator
KQC King's College London
K&R Kernighan and Ritchie, the c programming language
KS King's Scholar
KSC Kennedy Space Center (NASA) [Space]
KSU Key System Unit [Telephony]
KTB Cretaceous-Tertiary Boundary (from German) [Space]
KTS Key Telephone System [Telephony]
KTU Key Telephone Unit [Telephony]
KWIC Key Word In Context
KY Kentucky
L1 Lagrange Point #1 35,000 Miles above moon [Space]
L2 Lagrange Point #2 40,000 Miles behind moon [Space]
L3 Lagrange Point #3 (?? 35,000 Miles below moon) [Space]
L4 Lagrange Point #4 240,000 mile Earth orbit [Space]
L5 Lagrange Point #5 240,000 mile Earth orbit [Space]
LA Los Angeles
LA Louisiana
LA Low Altitude
LADAR LAser Detection And Ranging
LAM Master of Liberal Arts
LAMA Local Automatic Message Accounting [Telephony]
LAN Local Apparent Noon
LAN Local Area Network
LANL Los Alamos National Laboratory [Space]
LANL Los Alamos (NM) National Laboratory
LAPB Link Access Procedure (Balanced)
LAPD Link Access Procedure (??)
LAPD Los Angeles (CA, US) Police Department
LAR Local Acquisition Radar
LaRC Langley Research Center (NASA) [Space]
LASER Light Amplification by Stimulated Emission of Radiation
LAT Local Apparent Time
LATA Local Access and Transport Area [Telephony]
LAX Los Angeles International Airport
LB Light Bomber
LB pound (LiBra)
LBHS Long Beach High School
LBL Lawrence Berkeley (Calif.) Labs
LBS Pounds
LC inductor-Capacitor circuit (as in filters, L is symbol inductance)
LCD Liquid Crystal Display
LCD Lowest Common Denominator
LCDR Lieutenant Commander
LCL Less than Carload Lot [Railroading]
LCL Lunar Cargo Lander [NASA OEXP]
LCM Least Common Multiple
LCM Life Cycle Management
LCS Laboratory for Computer Science (of MIT)
LCT Landing Craft Tanks
LD Long Distance [Telephony]
LDC Long Distance Carrier [Telephony]
LDEF Long Duration Exposure Facility [Space, NASA]
LDF Large Deployable Reflector [Space]
LDL Low Density Lipoprotein
LDX Long Distance eXtender [Telephony]
LEAP Low-power Enhanced At Portable
LEC Local Exchange Carrier [Telephony]
LED Light Emitting Diode
LEM Lunar Excursion Module (a.k.a. LM) (Apollo spacecraft) [Space]
LEO Low Earth Orbit [Space]
LEP Large Electron-Positron collider [CERN]
LeRC Lewis Research Center (NASA) [Space]
LEST Large Earth-based Solar Telescope [Space]
LF Low Frequency (30-300KHz)
LFSA List of Frequently Seen Acronyms (!) [Space]
LGA Low Gain Antenna [Space]
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