| Acronym | Meaning |
| BSR | Basic System Release |
| CVT | Communications Vector Table |
| DA&D | Data Acquisition And Distribution |
| ICO | Integrated Checkout |
| SIN | Sine |
| DCR | Document Change Record (or Review) |
| PSF | Processing And Storage Facility (ET) |
| V&DA | Video And Data (Processing) Assembly |
| MID | Midbody |
| IN | Information Systems Directorate (KSC) |