| Acronym | Meaning |
| TSM | Tail Service Mast |
| RTE | Responsible Test Engineer |
| V/V | Validation And Verification (also V&V) |
| CNTRL | Control |
| PCTE | Portable Commercial Test Equipment |
| MDCS | Master Digital Command System |
| INSTRUMENT | Checkout Equipment |
| WA | Wide Angle |
| MPM | Manipulator Positioning Mechanism |
| ORB | 1 -g Orbiter One-g (trainer) |