| ACIS |
AXAF CCD Imaging Spectrometer |
| ACS |
Advanced Camera for Surveys |
| APT |
Astronomer's Proposal Tools |
| AR |
Archival Research |
| ATP |
Astrophysics Theory Program |
| AURA |
Association of Universities for Research in Astronomy, Inc. |
| CADC |
Canadian Astronomy Data Centre |
| CCD |
Charge-Coupled Device |
| CoI |
Co-Investigator |
| CPAR |
Coordinated Parallel Observation |
| CS |
Contact Scientist |
| CVZ |
Continuous Viewing Zone |
| CXC |
Chandra X-ray Center |
| DD |
Director's Discretionary |
| DEC |
Declination |
| DUP |
Duplicate Observation |
| EDT |
Eastern (U.S.) Daylight-savings Time |
| E/PO |
Education/Public Outreach |
| ESA |
European Space Agency |
| EST |
Eastern (U.S.) Standard Time |
| FGS |
Fine Guidance Sensor(s) |
| FTP |
File Transfer Protocol |
| FUV |
Far Ultraviolet |
| GO |
General Observer |
| GSFC |
Goddard Space Flight Center |
| GTO |
Guaranteed Time Observer |
| HDF |
Hubble Deep Field |
| HET |
Hobby-Eberly Telescope |
| HOPR |
Hubble Observation Problem Report |
| HRC |
High Resolution Channel (on ACS) or High Resolution Camera (on Chandra) |
| HST |
Hubble Space Telescope |
| HTML |
Hyper Text Markup Language |
| IDEAS |
Initiative to Develop Education through Astronomy and Space Science |
| IR |
Infrared |
| LOW |
Low Sky Background |
| MAMA |
Multi-Anode Microchannel Array |
| MAST |
Multi-mission Archive at Space Telescope |
| MMT |
Multiple Mirror Telescope |
| NASA |
National Aeronautics and Space Administration |
| NICMOS |
Near Infrared Camera and Multi-Object Spectrometer |
| NOAO |
National Optical Astronomy Observatory |
| NUV |
Near Ultraviolet |
| NVO |
National Virtual Observatory |
| OS |
Observation Summary |
| OSS |
Office of Space Science |
| PAEC |
Planned and Archived Exposures Catalog |
| PC |
Planetary Camera or Program Coordinator |
| PDF |
Portable Document Format |
| PI |
Principal Investigator |
| PPAR |
Pure Parallel Observation |
| RA |
Right Ascension |
| SAA |
South Atlantic Anomaly |
| SBC |
Solar Blind Channel |
| SHD |
Shadow Time |
| SIRTF |
Space Infra-Red Telescope Facility |
| SM |
Servicing Mission |
| SNAP |
Snapshot |
| STAC |
Space Telescope Advisory Committee |
| ST-ECF |
Space Telescope - European Coordinating Facility |
| STIS |
Space Telescope Imaging Spectrograph |
| STScI |
Space Telescope Science Institute |
| STSDAS |
Space Telescope Science Data Analysis Software |
| TAC |
Telescope Allocation Committee |
| TOO |
Target of Opportunity |
| U.S. |
United States |
| UTC |
Coordinated Universal Time |
| UV |
Ultraviolet |
| VTT |
Visual Target Tuner |
| WFC |
Wide Field Camera (on WFPC2) or Wide Field Channel (on ACS) |
| WF/PC |
Wide Field and Planetary Camera 1 |
| WFPC2 |
Wide Field and Planetary Camera 2 |
