| Acronym | Meaning |
| HZ | Hertz (Cycles Per Second) |
| IT | Identification Transponder |
| CDNR | CDR Discrepancy Notice Record |
| SPS | Service Propulsion Subsystem |
| LN | Line |
| EM | Emergency |
| L | Left |
| STLOS | Star Line Of Sight |
| IPR | Interim Problem Report |
| CTIS | Crawler Transporter Intercom System |