| Acronym | Meaning |
| EBR | Eyeballs Right (-GY) |
| BLV | Bleed Valve |
| DPP | Definition Phase Review |
| CRPL | Cosmic Ray Physics Laboratory |
| SDTA | Structural Dynamic Test Article |
| OSS | OPtics Subsystems |
| FCSS | Fuel Cell Servicing System |
| GFRP | Glass Fiber Reinforced Plastics |
| M50 | Mean Of 1950 (Coordinate System) |
| SPOC | Shuttle Payload Operations Contractor |