| Acronym | Meaning |
| IUE | Interface Unit Error Count Table |
| ISOL | Isolate |
| MULT | Multiple |
| RTV | Room-temperature Vulcanizing |
| QCOP | Quality Control Operating Procedure |
| LSM | ILogistics Support Management Information |
| OASCB | Orbiter Avionics Software Control Board |
| PMP | Pump |
| ELS | Earth Landing System (Subsystem) |
| HQ | Headquarters (HDQ Preferred) |