CIT Circumstellar Imaging Telescope [Space]
CLASP Comprehensive Logistics Automated Support Program
CLASS Custom Local Area Signaling Service [Telephony]
CLI Command Line Interpreter
CLID Calling Line ID [Telephony] (see also: CID, ANI)
CLNP Connectionless-mode Network Protocol
CLNS Connectionless-mode Network Service
CLR Combined Line and Recording
CLRC Circuit Layout Record Card
CLU Chartered Life Underwriter
CLUT Color LookUp Table
cm centimeters
CM Command Module (Apollo spacecraft) [Space]
CM Congregation of the Mission
CMC Communication Machinery Corp.
CMD Centralized Message Distribution
CMIP Common Management Information Protocol
CMIS Common Management Information Services
CML Current Model Logic
CMMU Cache/Memory Management Unit
CMOS Complementary Metal Oxide Semiconductor (see MOS)
CMOT Common Management Information Services and Protocol Over TCP/IP
CMRR Common Mode Rejection Ratio
CMS Circuit Maintenance System
CMSgt Chief Master Sergeant
CMU Carnegie-Mellon University
CMYK Cyan, Magenta, Yellow, blacK
CN Canadian National [Corporate name, Railroading]
CN/A Customer Name / Address [Telephony]
CNI Common Network Interface [Telephony, AT&T] (Department of AT&T)
CNN Cable News Network
CNO Carbon-Nitrogen-Oxygen [Space]
CNO Chief of Naval Operations
CNR Canadian National Railways
CNR Carrier to Noise Ratio
CNRI Corporation for National Research Initiatives
CNRS Centre National de la Recherche Scientifique (French National Center for Scientific Research)
CNS Central Nervous System
CNSR Comet Nucleus Sample Return [Space]
CO Cash Order
CO Central Office [Telephony]
CO Colorado
CO Commanding Officer
CO Conscientious Objector
C/O in Care Of
COB Close Of Business
COBE COsmic Background Explorer [Space]
COBOL COmmon Business Oriented Language
COC Call of Cthulhu
COCOT Customer Owned, Coin Operated Telephone [Telephony]
COD Collect On Delivery; Cash On Delivery
CODEC COder-DECoder
COER Central Office Equipment Report
COLA Cost-Of-Living Allowance
COM Computer Output (on) Microfiche
COM Computer Output (on) Microfilm
COMAS Central Office Maintenance and Administration System
COMM Communications
COMPACT COMmercial Product ACquisition Team
COMPTEL COMPton TELescope (on GRO) [Space]
COMSAT Communications Satellite [Space]
CONACYT Consejo Nacional de Cienca Y Tecnologia (Mexican National Council of Science and Technology)
CONS Connection-Oriented Networking Service
CONS Connection-Oriented Networking Session
CONS CONStruct (LISP)
CORE COntrolled Requirement Expression
CORN COmputer Resource Nucleus
COS Corporation for Open Systems
COSINE Cooperation for Open Systems Interconnection Networking in Europe
COSMIC COmmon System Main InterConnecting frame
COSMIC COmputer Software Management and Information Center
COSMOS COmputer System for Mainframe OperationS
COSTAR Corrective Optics Space Telescope Axial Replacement [Space]
COT Card Or Tape (NCR)
CP Campus Police (MIT, others probably too)
CP Canadian Pacific
CP Chemically Pure
CP Command Post
CP Command Processor
CP CoPy
CP the Canadian Press
CPA Certified Public Accountant
CPE Customer Premises Equipment
CPE Customer Provided Equipment
CPFF Cost Plus Fixed Fee
CPI Characters Per Inch
CPI Common Programming Interface
CPL Combined Programming Language
CPM Control Program for Microcomputers (sometimes CP/M)
CPM Control Program Monitor (sometimes CP/M)
CPO Chief Petty Officer
CPO Chief Post Office
CPR Canadian Pacific Railway
CPS Characters Per Second
CPSR Computer Professionals for Social Responsibility
CPT CaPTain
CPU Central Processing Unit
CPW Certified Public Weigher
CQ Change of Quarters
CR Carriage Return (ASCII 15 octal)
CRA Cambridge Redevelopment Authority
CRAF Comet Rendezvous / Asteroid Flyby [Space]
CRAM Card Random Access Memory (NCR, but maybe others)
CRC Chemical Rubber Company
CRC Cyclic Redundancy Check
CREG Concentrated Range Extension with Gain
CREN The Corporation for Research and Educational Networking (merge of BITNET and CSNet)
CRRES Combined Release / Radiation Effects Satellite [Space]
CRRES Combined Release and Radiation Effects Satellite [NASA]
CRT Cathode Ray Tube (also generic reference to a terminal)
CRTC Canadian Radio-television and Telecommunications Commission
C&S Chivalry & Sorcery
CS Civil Servant
CS Computer Science; Computing Science
CS County Seat
CSA Confederate States of America
CSAB Computing Sciences Accreditation Board
CSACS Centralized Status, Alarm and Control System
CSC Computer Sciences Corporation
CSDC Circuit Switched Digital Capability
CSF Critical Success Factor
CSI Commercial Systems Integration
CSIS Canadian Security and Intelligence Service
CSL Coin Supervising Link
CSM Command and Service Module (Apollo spacecraft) [Space]
CSM Command Sergeant Major
CSMA Carrier Sense Multiple Access
CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
CSMA/CD Carrier Sense Multiple Access with Collision Detection
CSNET Computer + Science Network (merged with BITNET to make CREN)
CSO Central Services Organization
CSOC Consolidated Space Operations Center (at Colorado Springs)
CSP Control Switching Point
CSR Control and Status Register
CSR Customer Service Representative [Telephony]
CSRG Computer Systems Research Group
CSRS civil Service Retirement System
CSS Customer Switching System
CST Central Standard Time
CSU Channel Service Unit
CT Central Time
C&T Communications & Tracking [Space]
CT Connecticut
CTC Canadian Transport Commission
CTC Centralized Traffic Control [Railroading]
CTD Computing and Telecommunications Division
CTIO Cerro Tololo Inter-american Observatory
CTIO Cerro Tololo Interamerican Observatory [Space]
CTNE Compania Telefonica Nacional de Espana
CTS Clear To Send (EIA RS-232-C)
CTS Compatible Timesharing System
CTV Canadian TeleVision network
CU Close-Up
CUA Common User Access
CUL See You Later [Net jargon]
CV Curriculum Vitae
CW Car Wars
CW Chemical Warfare
CW Child Welfare
CW Churchwarden
CW Churdwarden
CW Continuous Wave
CWO Cash With Order
CWO Chief Warrant Officer
CWRU Case Western Reserve University
CXI Common X-windows Interface
CY Calendar Year
CYO Catholic Youth Organization
CZ Canal Zone
D Depth
DA Days after Acceptance
DA Department of Agriculture
DA Deposit Account
D/A Digital to Analog converter
DA Directory Assistance (/C = computerized, /M = Microfilm) [Telephony]
DA District Attorney
DA Don't Answer [Telephony] (may be more general)
DAC Digital to Analog Converter
DA/C Directory Assistance/Computerized
DACCS Digital Access Cross Connect System [Telephony] (suspect, see DACS)
DACS Digital Access Cross-connect System [Telephony]
DAD Draft ADdendum
DAG Directed Acyclic Graph
DAL Dedicated Access Line [Telephony]
DA/M Directory Assistance/Microfilm
DAP Division Advisory Panel (of NSF (q.v.) DNCRI (q.v.))
DAR Daughters of the American Revolution
DARE Drug Abuse Resistance Education
DARPA Defense Advanced Research Projects Agency (of the DoD, see also ARPA)
DASD Direct Access Storage Device
DAT Digital Audio Tape
DATA Defense Air Transport Administration
DAV Disabled American Veterans
DB DataBase
db decibel(s)
dba doing business as
DBF DBase Format
DBME DataBase Managment Environment
dbms DataBase Management System (rdbms for Relational ...)
DBRAD Data Base Relational Application Directory
DC Direct Current (dc, see also AC)
DC District of Columbia
DCA Defense Communications Agency
DCA Distributed Communication Architecture
DCA Document Content Architecture
DCC Descriptive Cataloging Committee
DCCO Defense Commercial Communications Office
DCD Data Carrier Detect (sometimes CD (q.v.)) (EIA RS-232-C)
DCE Data Communication Equipment
DCL Digital Command Language
DCP Distributed Communications Processor
DCTS Dimension Custom Telephone Service
DD Daredevils
DD Data Dictionary
DD Days after Date
DD Demand Draft
DD Dishonorable Discharge
DD Disk Drive
DD Doctor of Divinity
D&D Dungeons & Dragons
DDC Digital Data Converter
DDCU DC-to-DC Converter Unit [Space]
DDD Direct Distance Dialing [Telephony] (principally US, elsewhere STD)
DDL Document Description Language
DDN Defense Data Network
DDP Distributed Data Processing
DDS Dataphone Digital Service [AT&T]
DDS Digital Data Service
DDS Direct Digital Service
DDS Doctor of Dental Science
DDS Doctor of Dental Surgery
DDT DEC Debugging Tape
DDT Di- (pesticide)
DDT Dynamic Debugging Technique
DE Delaware
DEA Drug Enforcement Agency [US Government]
DEAR Department of Energy Acquisition Regulation
DEC Digital Equipment Corporation [Corporate name]
DECUS Digital Equipment Corporation Users Society
DES Data Encryption Standard [NIST]
DEW Distant Early Warning (as in DEW Line)
DF Damage Free
D/F Direction Finding
DFC Distinguished Flying Cross
DFD Data Flow Diagram
DFE Data Flow Editor
DFM Distinguished Flying Medal
DFN Deutsche Forschungsnetz Verein (German Research Network Association)
DFRF Dryden Flight Research Facility [Space]
DFS Depth-First Search
DFW Dallas-Ft.Worth (regional airport)
DG Data General [Corporate name]
DG Dei Gratia (by the grace of God)
DG Director General
DGSC Defense General Supply Center
DHHS Department of Health and Human Services
DHSS british Department of Health and Social Security
DHSS Department of Health and Social Security (British)
DIA Document Interchange Architecture
DIAD (magnetic) Drum Information Assembler / Dispatcher
DIAL Direct Information Access Line
DIAS Defense Automatic Integrated System
DID Direct Inward Dialing [Telephony]
DIF Document Interchange Format
DIN Deutsches Institut fur Normung
DIRE Dire Is Really Emacs
DIS Draft International Standard [ISO]
DISA Data Interchange Standards Association
DISOSS Distributed Office Support System [IBM]
DIY Do It Yourself
DJ Disc Jockey
DLA Defense Logistics Agency
DLI Data Link Interface(?)
DLL Data Link Layer [ISO OSI]
DLL Dial Long Line equipment
DLO Dead Letter Office
DM Dungeon Master
DMA Direct Memory Access
DMD Doctor of Dental Medicine
DME Distance Measuring Equipment
DMF Probably part of an X.400 address in Europe
DMOS Diffusion Metal Oxide Semiconductor (see MOS)
DMSP Defense Meteorological Satellite Program [Space]
DMV Department of Motor Vehicles
DMV Department of Motor Vehicles (Calif)
DMZ DeMilitarized Zone
DNA DeoxyriboNucleic Acid
DNA Digital Network Architecture [DEC]
DNCRI [NSF] (q.v.) Division of Networking and Communications Research and Infrastructure
DNHR Dynamic NonHierarchical Routing
DNIC Data Network Identification Code [Telephony]
DNIS Dialed Number Identification Service (see also DID) [Telephony]
DNL Director of Naval Laboratories
DNR Dialed Number Recorder [Telephony]
DNS Domain Name System
DOA Dead On Arrival
DOB Date Of Birth
DOC Dynamic Overload Control
DOD Department Of Defense [US Government] (sometimes DoD)
DOE Department of Energy [US Government]
DOHC Dual OverHead Cams [Automotive]
DOMAIN Distributed Operating Multi Access Interactive Network (Apollo)
DOS Disk Operating System
DOT Department Of Transportation [US Government]
DOT&E Director, Operational Test and Evaluation
DOV Data Over Voice [Telephony]
DOY Day of Year
DP Data Processing
DP Dial Pulse [Telephony]
DP Displaced Persons (expelled from native land)
DP Display Postscript
DP Double Penetration
DP Double Play
DP Draft Proposal
DPA Delegation of Procurement Authority
DPANS Draft Proposed American National Standard
DPI Dots Per Inch
DPS Display PostScript
DQ Dairy Queen
DQ Dragon Quest
DQDB Distributed Queue Dual Bus (IEEE 802.6) [Telephony, Networking]
DQL Database Query Language
DR Dead Reckoning
DR Dining Room
DRAM Dynamic Random Access Memory (as opposed to static RAM)
DRD Data Reading Device
DRE Directional Reservation Equipment
DRG Democratic Republic of Germany (East Germany)
DRI Defense Research Internet
DRI Digital Research, Incorporated [Corporate name]
d.s. died single [Genealogy]
DS Double-Sided
DS Draft Standard
DSA Dial System Assistance
DSE Data Structure Editor
DSEE Domain Software Engineering Environment
DSM Distinguished Service Medal
DSO Distinguished Service Order
DSP Decessit Sine Prole (died without issue)
DSP Digital Signal Processing
DSRI Digital Standard Relational Interface
DSS Decision Support System
DSS Direct Station Selection [Telephony]
DST Daylight Saving Time
DSTN Double SuperTwisted Nematic
DSU Digital Service Unit
DT Delirium Tremens
DTE Data Terminal Equipment
DTF Dial Tone First payphone [Telephony]
DTMF Dial Tone Multi Frequency [Telephony]
DTP DeskTop Publishing
DTR Data Terminal Ready (EIA RS-232-C)
DUI Driving Under the Influence
DUT Device Under Test
DV Deo Vo lente (God willing)
DVM Digital Volt Meter
DVM Doctor of Veterinary Medicine
DWAPS Defense Warehousing Automated Processing System
DWI Died Without Issue [Genealogy]
DWI Driving While Intoxicated
DWIM Do What I Mean
DX Distance (as in long distance radio communication)
DXT Data eXtractT facility
d.y. died young [Genealogy]
E East
E Espionage
EADASS Engineering and Administrative Data AcquiSition System
EAFB Edwards Air Force Base [Space]
EAN Certainly part of an X.400 Address in Europe
EARN European Academic Research Network
EAS Extended Area Service (or Engineering Admin. System)
EASI European Academic Supercomputer Initiative (of IBM)
EBCDIC Extended Binary Coded Decimal Interchange Code
EC Exchange Carrier [Telephony]
ECAFE Economic Commission for Africa and the Far East
ECASS Electronically Controlled Automatic Switching System
ECASS Export Control Automated Support System
ECC Error Correction Code
ECC Error Correction Code (corrects error in memory or transmission)
ECCM Electronic Counter-CounterMeasures
ECDO Electronic Community Dial Office
ECG ElectroCardioGram
ECL Emitter Coupled Logic (see also TTL)
ECLSS Environmental Control and Life Support System [Space]
ECM Electronic Counter Measure
ECM European Common Market
ECMA European Computer Manufacturers Association
ECO Ecological
ECO Electronic Central Office
ECO Engineering Change Order
ECPA Electronic Communications Privacy Act [US law]
ECS Environmental Control System [Space]
ECT ElectroConvulsive Therapy
ECV Electric Cargo Vehicle [NASA OEXP]
ED&D Expert Dungeons & Dragons
EDGAR Electronic Data Gathering, Analysis, and Retrieval
EDI Electronic Data Interchange
EDIF Electronic Design Interchange Format
EDO Extended Duration Orbiter [Space]
EDP Electronic Data Processing
EDS Electronic Data Systems
EDT Eastern Daylight Time
EDTA Ethylene Diamine Tetraacetic Acid
EDTCC Electronic Data Transmission Communications Central
EE Electrical Engineer
EE Electrical or Electronics Engineer
EEC European Economic Community
EEC European Economic Comunity
EEG ElectroEncephaloGram
EEL Epsilon Extension Language
E&EO Errors and Omissions Excepted
EEPROM Electrically Erasable Programmable Read Only Memory
EFF Electronic Frontier Foundation
e.g. ??? (Latin(?): for example)
EGA Enhanced Graphics Adapter
EGP Exterior Gateway Protocol [Internet]
EGRET Energetic Gamma Ray Experiment Telescope (on GRO) [Space]
EHF Extremely High Frequency (30-300GHz)
EIA Electronic Industries Association
EINE EINE Is Not Emacs
EISA Extended Industry-Standard Architecture
EISS European Intelligence Support System
EKG ElectroKardioGramm (see ECG)
EL ElectroLuminescent (as in display)
ELF Extremely Low Frequency
ELO Electric Light Orchestra
ELP Emerson, Lake and Palmer (or Powell)
ELV Expendable Launch Vehicle [Space]
E&M ``Ear and Mouth''; receive and transmit leads of a signalling system
EM Enlisted Man (see EW)
EMA Electronic Mail Association
EMACS Editor MACroS
EMACS Eight Megabytes And Constantly Swapping
E-MAIL Electronic MAIL
EMF ElectroMotive Force
EMF ElectroMotive Force (voltage)
EMI ElectroMagnetic Interference
EMP Electromagnetic Pulse
EMPRESS EnvironMental Pulse Radiation Environment Simulator for Ships
EMR ElectroMagetic Response
EMR ElectroMagnetic Response
EMS Electronic Message System
EMS Extended Memory Specification
EMT Emergency Medical Technician
EMU ElectroMagnetic Unit
EMU Extravehicular Mobility Unit [Space]
ENIAC Electronic Numerical Integrator and Calculator
ENS ENSign
EO End Office [Telephony]
EO Erasable Optical
EOF End Of File
EOM End Of Month
EOS Earth Observing System [Space]
EOWG Engineering and Operations Working Group (under FNC)
EP Experience Points
EP Extended Play
EPA Environmental Protection Agency
EPOS Engineering and Project-management Oriented Support system
EPRI Electric Power Research Institute
EPROM Erasable Programmable Read Only Memory
EPS Encapsulated PostScript
EPT Empire of the Petal Throne
EQ Educational Quotient (see IQ)
ER Emergency Room
ERA Earned Run Average
ERA Entity-Relationship-Attribute
ERA Equal Rights Amendment
ERD Entity-Relation Diagram
ERE Entity Relationship Editor
ERT Earth Resources Technology [Space]
ES Expert System
ESA European Space Agency
ESA European Space Agency [Space]
ESAC Electronic Systems Assistance Center
ESDI Enhanced Standard Device Interface
ESE East South East
ESF Extended Superframe Format [Telephony]
ESM Electronic Support Measures
ESnet Energy Sciences network (DoE) [Networking]
ESO European Southern Observatory
ESO European Southern Observatory [Space]
ESP Extra Sensory Perception
ESPS Entropic Signal Processing System
ESS Electronic Switching System [Telephony]
ESSEX Experimental Solid State EXchange
EST Eastern Standard Time
ET Eastern Time
ET Extra Terrestrial [Space]
ET (Shuttle) External Tank [Space]
ETA Estimated Time of Arrival
ET/ACC External Tank/Aft Cargo Carrier (see also ET) [Space]
ETC Et cetera, and so on...
ETD Estimated Time of Departure
ETFD Electronic Toll Fraud Device [Telephony]
ETH Eidgn\:oessiche Technische Hochschule (Swiss Federal Institute of Technology)
ETLA Extended Three Letter Acronym [Space]
ETO Earth-to-Orbit [Space]
ETR Eastern Test Range [Space]
ETS Electronic Translator System
ETV Education TeleVision
EUUG European Unix User Group
EUV Extreme UltraViolet
EUV Extreme UltraViolet [Space]
EUVE Extreme UltraViolet Explorer [Space]
EVA ExtraVehicular Activity
EVA ExtraVehicular Activity [Space]
EVX Electronic Voice eXchange
EW Electronic Warfare
EW Enlisted Woman (see EM)
EWOS European Workshop for Open Systems
FA Football Association (British soccer--a word derived from Association)
FAA Federal Aviation Agency [US Government]
FACD Foreign Area Customer Dialing
FAO Food and Agriculture Organization [US Government]
FAQ Frequently Asked Questions [Space]
FAR Federal Acquisition Regulations
FAS Foreign Agricultural Service
FAS Free Alongside Ship
FASST Flexible Architecture Standard System Technology
FAST Fast Auroral SnapshoT explorer [Space]
FAT Foreign Area Translation
FAX FAcsimile
FB Freight Bill
FBI Federal Bureau of Investigation [US Government]
FCC Federal Communications Commission [US Government]
FCC Federal Computer Conference
FCCSET Federal Coordinating Committee for Science, Education and Technology (under OSTP) {Maybe Eng. for Edu.??}
FCO Field Change Order
FCO Frequency Controlled Oscillator
FCS Frame Check Sequence
FDA Food and Drug Administration [US Government]
FDDI Fiber Digital Data Interface
FDDI Fiber Distributed Data Interface
FDHD Floppy Drive High Density
FDIC Federal Deposit Insurance Corporation
FDIC Federal Deposit Insurance Corporation [US Government]
FDM Frequency Division Multiplexing
FDR Franklin Delano Roosevelt [US President]
FE Field Engineer (see also CE, SE)
FEA Finite Element Analysis
FEDSIM FEDeral Systems Integration and Management center
FEMA Federal Emergency Management Agency
FEMF Foreign EMF (q.v.) (a.k.a. Cross Battery) [Telephony]
FEPC Fair Employment Practices Commission
FEPG Federal Engineering Planning Group (of FNC under EOWG, originally of FRICC)
FERS Federal Employees Retirement System
FET Federal Excise Tax
FET Field Effect Transistor
FFA Future Farmers of America
FFT Fast Fourier Transform
FFT Fast Fourier Transform [Space]
FG-A Feature Group A [Telephony] (Line Side termination for LD carriers)
FG-B Feature Group B [Telephony] (Trunk Side termination for LD carriers (aka ENFIA B), 950 service)
FG-D Feature Group D [Telephony] (Trunk Side termination for LD carriers, 1+ service)
FGS Fine Guidance Sensors (on HST) [Space]
FHA Federal Home Administration
FHA Future Homemakers of America
FIB Focused Ion Beam
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