| Acronym | Meaning |
| RRI | Rendezvous Radar Indicator |
| PCM | E Pulse-Code Modulation Event |
| ERS | Engineering Release System |
| FIAR | Failure Investigation Action Report |
| SRR | Site Readiness Review |
| RIL | Recoverable Item(s) List(s) |
| PR | PulseRate |
| OPA | Operations Planning Analysis |
| QTR | Quarter |
| FMDM | Flex Multiplexer/Demultiplexer |