| Acronym | Meaning |
 | PSAC | Presidential Scientific Advisory Committee |
| PBDM | Payload Bay Door Mechanism |
| SRCB | Software Requirements Control Board |
| TT | Total Time |
| FRE | Flight Related Element |
| SIE | Shuttle Interface Equipment Services |
| SRDH | System Requirements Definition Handbook |
| PDS | Partitioned Data Set |
| T/C | Thrust Chamber |
| SSD | Spacecraft Software Division |
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