| Acronym | Meaning |
| JOR | Job Order Request |
| R/W | Read/Write |
| PACAS | Personnel Access Control Accountability System |
| GCC | Ground Communications Coordinator |
| IU | Instrument Unit |
| PRS | Precision Ranging System |
| PU | Power Unit |
| DIF | Discrete Increment Filter |
| OMCF | Operations And Maintenance Control File |
| FDS | Fluid Distribution System |