| Acronym | Meaning |
 | OPPAR | Orbiter Project(s) Parts Authorization Request |
| ISS | Installation Support Services |
| LPDM | List Of Physical Dimensions |
| RIL | Repairable Item List |
| DSA | Defense Supply Agency |
| CRO | Cathode Ray Oscillograph(s) Or Oscilloscopes |
| MI | Mechanical Joint |
| P-P | Peak-to-Peak (Value) |
| HRD | High-rate Dosimeter |
| SEADS | Shuttle EntrY Air Data System (Subsystem) |
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