| Acronym | Meaning |
| POSIX | Portable Operating System Interface |
| ADS | Air Data System |
| F&PM | Fuel And Power Management |
| VMS | Vax Virtual Monitor System |
| ADP | Automatic Data Processing |
| SRB | Solid Rocket Booster |
| SIADS | Sensor Integration Display Sharing (an/sqq-89) |
| DSU | Data Synchronize Unit - Data Storage Unit |
| CSDS | Control Speed Drive Starter |
| SO | Standing Orders |