| Acronym | Meaning |
| DDDU | Digital Decoder Driver Unit |
| OIA | Office Of International Affairs |
| M | Mercury |
| PRSD | Power Reactant Storage And Distribution |
| CRYO | Cryogenic |
| PBIM | Programmable Buffer Interface Module |
| RJD | Reaction Jet Driver |
| CES | Control Electronics System |
| DETR | Detector |
| RS | Redundant Set (computers) |