ACE Advanced Composition Explorer
ADC Astronomical Data Center
ADF Astrophysics Data Facility
AE Atmospheric Explorer
AEROS AEROnomy Satellite
AIM Automated Internal Management
ANSI American National Standards Institute
API Applications Programming Interface
ARCAD ARC Aurorale et Densite
ATMOWEB Web interface for ATMOspheric data
CCSDS Consultative Committee for Space Data Systems
CD-ROM Compact Disk-Read Only Memory
CD-WO Compact Disk-Write Once
CDAW Coordinated Data Analysis Workshop
CDF Common Data Format
CGRO Compton Gamma Ray Observatory
COBE Cosmic Background Explorer
COHO Coordinated Heliospheric Observations
DADs Digital Archive Directions
DE Dynamics Explorer
DEDSL Data Entity Dictionary Specification Language
DLT Digital Linear Tape
EOSDIS Earth Observing System Data and Information System
EUVE Extreme Ultraviolet Explorer
FAST Fast Auroral SnapshoT
FEP Formats Evolution Process
FIRAS Far Infrared Absolute Spectrophotometer
FITS Flexible Image Transport System
FSO FITS Support Office
FTP File Transfer Protocol
GB Gigabyte
GOES Geostationary Observational Environmental Satellite
GSFC Goddard Space Flight Center
HEAO High Energy Astrophysics Observatory
HEASARC High Energy Astrophysics Science Archive Research Center
HST Hubble Space Telescope
HUT Hopkins Ultraviolet Telescope
IAU International Astronomical Union
IDA Interactive Data Archive
IMF Interplanetary Magnetic Field
IMP Interplanetary Monitoring Platform
IRAND Interactive Request and Name Directory
IRAS Infrared Astronomical Satellite
ISEE International Sun-Earth Explorer
ISIS International Satellite for Ionosphere Studies
ISO International Standards Organization
ISTP International Solar-Terrestrial Physics
IUE International Ultraviolet Explorer
KP Key Parameters
LANL Los Alamos National Laboratory
MAST Multimission Archive at STScI
M-O Magneto-optic
MSU Moscow State University
NASA National Aeronautics and Space Administration
NDADS NSSDC Data Archive and Distribution System
NMC NSSDC Master Catalog
NOST NASA/Science Office of Standards and Technology
NRAO National Radio Astronomy Observatory
NSDF NSSDC Supplementary Data File
NSSDC National Space Science Data Center
OAIS Open Archival Information System
OGLE Optical Gravitational Lensing Experiment
OMNI Interplanetary Medium Data
OSO Orbiting Solar Observatory
OSS Office of Space Science
PDF Portable Document Format
PDS Planetary Data System
PIMS Personnel Information Management System
PVL Parameter Value Language
PVO Pioneer Venus Orbiter
RAID Redundant Array of Independent Disks (originally, 'I' was 'Inexpensive')
ROSAT ROentgen SATellite
RXTE  Rossi X-ray Timing Explorer
SAMPEX Solar Anomalous and Magnetospheric Particle Explorer
S/C Spacecraft
SEC Sun Earth Connection
SECEF SEC Education Forum
SPyCAT Space Physics CATalog
SSC Satellite Situation Center
SSDOO Space Science Data Operations Office
SSDS Space Science Data Service
STScI Space Telescope Science Institute
TB Terabyte
TRF Technical Reference File
UIT Ultraviolet Imaging Telescope
UK United Kingdom
WDC World Data Center
WDC-A-R&S World Data Center A for Rockets and Satellites
WDC-SI A-R&S) WDC for Satellite Information (formerly WDC-A-R&S)
WORM Write-Once, Read-Many
WUPPE Wisconsin Ultraviolet Photopolarimetry Experiment
WWW World Wide Web
XML eXtensible Markup Language