| Acronym | Meaning |
 | RAD | Roentgen Absorbed Dosage |
| SIS | Shuttle Interface Simulator |
| HD | Heavy Duty |
| HTPB | Hydroxyl Terminated Polybutadiene (Propellant) |
| SSIS | Space Station Information System |
| MPL | Maintenance Parts List |
| S | Second (Astronomical Tables) |
| SPA | Signal Processor Assembly |
| ICMO | Integrated Configuration Ianagement Office |
| JOD | Joint Occupancy Date |
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