| Acronym | Meaning |
| FDL | Flight Director Loop |
| FCC | Federal Communications Commission |
| TVAR | Test Variance |
| GSSC | Ground Support Simulation Computer |
| IPS | IPTCSInternational Pipe Thread |
| PA | Pulse AmPlifier |
| VSN | Video SwitchingNetwork |
| SCIT | Standard Change Integration And Tracking |
| RFCP | Request For Computer Program |
| FACO | Factory Assembly And Checkout |