| Acronym | Meaning |
| OCD | Operational Capability Development |
| T | Temperature |
| PCMD | Pulse-Code Modulation |
| OMRSD | Operational Maintainability Reporting Systems Document |
| RAS | Requirements Allocation Sheet |
| ERAP | Earth Resources Aircraft Program |
| TV | Thermal Vacuum |
| HPOTP | High Pressure Oxidizer Turbopump |
| FL | MECH Fluid Mechanical |
| TC | Thermal Control |