| Acronym | Meaning |
| GPSS | General Purpose System Simulator |
| R | Reliability |
| P-P | Peak-to-Peak (Value) |
| SCDR | Seller Critical Design Review |
| SSFGSS | Space Shuttle Flight And Ground System Specification |
| CWSU | Condensate Water Servicing Unit |
| TPI | Terminal Phase Initiation |
| PL | Postlanding (P/L Preferred) |
| TELESAT | TELESAT (Canadian Payload |
| SIA | Shuttle Induced Atmosphere |