| Acronym | Meaning |
 | HAC | Heading Alignment Cylinder |
| ETC | Earth Terrain Camera |
| CSAS | ComPuterized Status Accounting System |
| GMN | GoGMNGorman (TACAN Station) |
| CIS | Central Integration Site |
| MAN | Microwave Aerospace Navigation |
| MMOS | Multimode Optical Sensor |
| OCO | Open-Close-Open |
| FACO | Fabrication And Acceptance Checkout |
| SIMS | Shuttle Imaging Microwave System |
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