| Acronym | Meaning |
| HRSI | High Temperature Reusable Surface Insulation |
| HITS | High Rate Multiplexer InPut/Output Test System |
| TPM | Terminal Phase Maneuver |
| SEADS | Shuttle EntrY Air Data System (Subsystem) |
| SMMD | Specimen Mass Measurement Device |
| PSF | Processing And Storage Facility (ET) |
| NAS | National Aircraft Standard |
| LC | Incremental Cost |
| MDAC | McDonnell Douglas Astronautics Company |
| SRD | Shuttle Requirements Document |