| Abbreviation | Definition |
|---|---|
| SIP | Scientific Instrument Package |
| SIP | Separation Instrument Package |
| SIP | Soft Input Panel |
| SIP | Standard Interface Panel |
| SIP | Strain Isolator Pad |
| SIP | Structurally Insulated Panel |
| SIPE | Scientific Instrument Protective Enclosure |
| SIPS | Small Instrument Pointing System |
| SIR | Shuttle Imaging Radar |
| SIR | Software Initiated Restart |
| SIR | System Interface Requirement |
| SIR | Systems Integration Review |
| SIR-A | Shuttle Imaging Radar-A |
| SIR-B | Shuttle Imaging Radar B |
| SIR-B | Shuttle Imaging Radar-B |
| SIRD | Support Instrumentation Requirements Document |
| SIRTF | Space Infra-Red Telescope Facility |
| SIS | SAIL (Shuttle Avionics Integration Laboratory) Interface System |
| SIS | SAIL Interface System |
| SIS | Satellite Information System |