| Acronym | Meaning |
| OD | Outside Diameter |
| SSFGSS | Space Shuttle Flight And Ground System Specification |
| ESDU | Event Storage And Distribution Unit |
| PIND | Particle Impact Noise Detection |
| SSUSP | Spinning Solid Upper Stage Project |
| RDOC | Reference Designation Overflow Code |
| PAD | ProgramApprovalDocument |
| U | Uranium |
| LCCD | Launch Commit Criteria Document |
| U/C | Under Current |