| Acronym | Meaning |
| PROM | Programmable Read-Only Memory |
| IPD | Information Processing Division |
| R | LEO Request Liaison Engineering Order |
| M | PTSMultipurpose Tool Set |
| REN | RAD Rendezvous Radar |
| PCA | Power Controller Assembly |
| SM | Stable Member |
| MDE | Modular Display Electronics |
| LOV | Loss Of Visibility |
| UD | Update |