| Acronym | Meaning |
| OESS | Orbiter/ET Separation Subsystem |
| OPFC | Orbiter Preflight Checklist |
| G&A | General And Administrative |
| TOP | Technical Operating Procedure |
| SLV | Space Launch Vehicle |
| SEI | SYstem Engineering Groundrule |
| DP/DT | Delta Pressure/Delta Time |
| O&C | Operation(s) And Checkout (Building-was MSOB) |
| CDS | Collision Detector System |
| FOR | Force |