| Acronym | Meaning |
| LPOP | Low Pressure Oxidizer Turbopump |
| P&M | Phase Modulation (Modulated) |
| SP&S | Special Processes And Sequencing |
| PKD | Programmable Keyboard And Display |
| TI | Training Integrator (Integration) |
| CGAU | Cabin Gas Analysis Unit |
| DRF | Digital |
| OMB | Office Of Management And Budget |
| CRB | Change Review Board |
| TPO | Test Program Out@ine |