| Acronym | Meaning |
 | CIS | Component Identification Sheet |
| LOP | In-Orbit Plane |
| L | Level |
| RDOC | Reference Designation Overflow Code |
| OMCF | Orbiter Maintenance And Checkout Facility |
| QTR | Quarter |
| NSTL | National Space Technology Laboratory (was MTF) |
| LAIR | Liquid Air |
| TW | Traveling Wave |
| TRI | Payload Furnished Mars Tape Recorder (1 Of 2) |
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