ADC Analog to Digital Converter
ADS Astrophysics Data System
AF Attitude File
AO Announcement of Opportunity
BBXRT Broad Band X-ray Telescope
BCF Basic Calibration File
CCD Charge Coupled Device
CPF Calibration Product File
CHIP Choose Input Parameters
CTE Charge Transfer Efficiency
DBMS Database Management System
FITS Flexible Image Transport System
FRF First Reduction File
FSF Filtered Science File
FTP File Transfer Protocol
GIS Gas scintillation Imaging Spectrometer
GO Guest Observer
GOF Guest Observer Facility
GSFC NASA Goddard Space Flight Center
GSPC Gas Scintillation Proportional Counter
HPD Half-Power Diameter
HEASARC High Energy Astrophysics Science Archive Research Center
HKF Housekeeping File
IRAF Interactive Reduction and Analysis Facility
ISAS Institute of Space and Astronautical Science
JSPS Japan Society for the Promotion of Science
LHEA Laboratory of High Energy Astrophysics
MPC Multi-channel Pulse Count
NEC Nippon Electric Company
NRA NASA Research Announcement
NSSDC National Space Science Data Center
OF Orbit File
OGIP Office of Guest Investigator Programs
PCAL Position Calibration
PHA Pulse Height Analysis
PROS Post Reduction Off-line Software
PV Performance Verification
QE Quantum Efficiency
RDBMS Relational Database Management System
SAA South Atlantic Anomaly
SF Science File
SIS Solid-state Imaging Spectrometer
SPIKE Scientific Planning Interactive Knowledge Expert system
SQL Structured Query Language