| Acronym | Meaning |
| SCR | Sneak Circuit Report |
| NCR | Nonconformance/Failure Report |
| MTDSK | Magnetic Tape Disk |
| SYS | System |
| CCU | Communications Carrier Umbilical |
| SAMSO | Space And Missile SYstems Organization (USAF) |
| GDBS | Generalized Data Base System |
| NSR | Normal Slow Rate (Maneuver) |
| MTTFF | Mean Time To First Failure |
| R | LEO Request Liaison Engineering Order |