| Acronym | Meaning |
 | MOL | Manned Orbiting Laboratory |
| SSO | Spurious Shut-off |
| WFPCII | Replacement For WFPC |
| PEM | Payload Electronics Module |
| OTHB | Over The Horizon Backscatter |
| CRISTA | Cryogenic Infrared Spectrometer Telescope For Atmosphere |
| LIS | Lightning Imaging Sensor |
| ESPC | European Space Power Conference |
| SPAS | Space Pallet Satellite |
| NICMOS | Near Infrared Camera/Multi Object Spectrometer |
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