| Acronym | Meaning |
| MTCU | Magnetic Tape Control Unit |
| D&CS | Display And Controls Subsystem |
| R&OA | Reliability And Quality Assurance |
| SCA | Sequence Control Assembly |
| EQUIP | Equipment |
| MOR | Manufacturing Operation Record |
| LARC | Langley Research Center (Hampton |
| TVCS | Thrust Vector Control System |
| PDR | Program Director's Review |
| HQ | Headquarters (HDQ Preferred) |