| Acronym | Meaning |
| TPCE | Tank Pressure Control Experiment |
| GMC | Giant Molecular Cloud |
| SLAR | Side-Looking Airborne Radar |
| PDRS | Payload Deployment And Retrieval System |
| AOCS | Attitude And Orbit Control System |
| VTHL | Vertical Takeoff Horizontal Landing |
| CRIM | Commercial Refrigerator Incubator Module |
| EGRET | Energetic Gamma Ray Experiment Telescope |
| PM | Pressurized Module |
| GC | Globular Cluster |