| Acronym | Meaning |
 | SDN | Software Development Note |
| VFO | Variable Frequency Oscillator |
| OF | Orbital Flight |
| PRE | Personal Rescue Enclosure |
| IAL | Immediate Action Letter |
| PIC | Payload Integration Committee |
| ERBS | Earth Radiation Budget Satellite |
| TOW | Tank And Orbiter Weight |
| OAFTO | Orbiter Atmospheric Flight Test Office |
| HAL/S | High-order Assembly Language/ Shuttle |
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