| Acronym | Meaning |
 | PBS | Protective Breathing System |
| D | Drag |
| EDC(M) | Electrochemical DePolarized CO (Module) |
| O/R | Outside Radius |
| M/P | Main Parachute |
| RECRC | Recirculate |
| BCWS | Budget Costs For Work Scheduled |
| MSDS | Multispectral Scanner And Data System |
| SCM | Subsystem Configuration Monitoring |
| O&C | Operation(s) And Checkout (Building-was MSOB) |
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