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AAS	American Astronomical Society
ADF Astrophysics Data Facility
ADS Astrophysics Data System
Astro-D Fourth Japanese X-ray Satellite (before launch)
ASCA Advanced Satellite for Cosmology and Astrophysics (formerly Astro-D)
AXAF Advanced X-ray Astrophysics Facility
BBXRT Broad Band X-Ray Telescope
CGRO Compton Gamma Ray Observatory (or Compton Observatory)
CMA Channel Multiplier Array (EXOSAT)
COSSC Compton Observatory Science Support Center
DXS Diffuse X-ray Spectrometer
EBIT Electron Beam Ion Trap
EUVE Extreme Ultraviolet Explorer
EXOSAT European X-ray Observatory Satellite
FITS Flexible Image Transport System
FOV Field of view
FPCS Flat Plane Crystal Spectrometer (Einstein)
GIS Gas Imaging Spectrometer
GOF Guest Observer Facility
GRASP Generic Retrieval/Archive Services Protocol
GSFC Goddard Space Flight Center
GSPC Gas Scintillation Proportional Counter (EXOSAT)
HEAD High Energy Astrophysics Division (of the AAS)
HEAO High Energy Astrophysics Observatory
HEASARC High Energy Astrophysics Science Archive Research Center
HED High Energy Detector (HEAO-1)
HRI High-Resolution Imager (Einstein and ROSAT)
IDL Interactive Data Language
IRAF NOAO's Image Reduction and Analysis Facility
IUE International Ultraviolet Explorer
LE Low Energy (EXOSAT)
LED Low Energy Detector (HEAO-1)
LHEA Laboratory for High Energy Astrophysics
LLNL Lawrence Livermore National Laboratory
ME Medium Energy (EXOSAT)
MED Medium Energy Detector (HEAO-1)
MPC Monitor Proportional Counter
MPE Max Planck Institut für Extraterrestrische Physik
NSSDC National Space Science Data Center
OGIP Office for Guest Investigator Programs
OGS Objective Grating Spectrometer (Einstein)
OSO Orbiting Solar Observatory
PIMMS Portable Interactive Multi-Mission Software
PSPC Position-Sensitive Proportional Counter (Einstein and ROSAT)
ROSAT Röntgensatellit
SAA South Atlantic Anomaly
SIS Solid-state Imaging Spectrometer
SSS Solid State Spectrometer (Einstein)
XANADU Analysis system containing XSPEC, XRONOS, XIMAGE and QDP
XSPEC Spectral fitting package (part of XANADU)
XTE X-ray Timing Explorer

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