| Acronym | Meaning |
| ORBI | Stock Ticker Symbol For OSC |
| ET | External Tank |
| AACS | Attitude And Articulation Control Subsystem |
| DARPA | Defense Advanced Research Projects Agency |
| NBS | National Bureau Of Standards |
| LN2 | Liquid Nitrogen |
| VIB | Vertical Integration Building |
| HAO | High Altitude Observatory |
| RIACS | Research Institute For Advanced Computer Science |
| RSN | Radio SuperNova |