| Acronym | Meaning |
| VZ | Velocity Along The Z-Axis |
| TI | Information Systems (KSC Directorate) |
| O/D | On Dock |
| PBL | Payload Bay Liner |
| GS | Ground Station |
| MTTR | Mean TimetoRepair |
| PWA | Product Work Authorization |
| PLD | Program Listing Document |
| CIS | Communication Interface System |
| EPA | Environmental Protection Agency |