| Acronym | Meaning |
| IPS | IRD Information Requirements Document |
| OPS | Orbiter Project Schedules |
| ORS | Orbital Refueling System |
| N2O4 | Nitrogen Tetroxide |
| SFC | Specific Fuel Consumption |
| RMS | Remote ManiPulator System (SubsYstem) |
| ODRAN | Operational Drawing Revision Advance Notice |
| GVA | GOX Vent Arm |
| TTC | Time To Circularize (Orbit) |
| SD | Space Division (AFSC) |