| Acronym | Meaning |
| GPME | General Purpose Mission Equipment |
| NCC | NASA Class Code |
| MFC | Multiple Flight Computer |
| SS | Single Sideband |
| ELECT | Electrical |
| GSIU | Ground Standard Interface Unit |
| REIL | Runway End Identification Lights |
| MRIR | Medium Resolution Infrared Radiometer |
| OMISS | Operation And Maintenance Instruction Summary Sheet(s) |
| I | FIntermediate Frequency |