| Acronym | Meaning |
| VAC | Vehicle Assembly And Checkout |
| T | Throttle Command |
| S/V | SuPply Valve |
| SPI | Surface Position Indicator |
| SRM | Solid Rocket Motor |
| HI | Honeywell |
| MAC | Multiaccess Computer |
| GOC | GrGOCGround Operations Coordinator |
| ISL | Inertial Systems Laboratory |
| VL | Expendable Vehicles (KSC VO Dir.) |