| Acronym | Meaning |
| FM | Frequency Modulation |
| NTIS | National Technical Information Service |
| DUM | Dummy |
| MRTC | Multiple Real-Time Commands |
| G-11 | Gulfstream 11 (Shuttle Training Aircraft) |
| IP | InstruMentation PCM Data Bus |
| DV | Designee For Verification |
| SAL | Shuttle Avionics Laboratory |
| M | Monitor (MON Preferred) |
| SLV | Space Launch Vehicle |