| Acronym | Meaning |
 | SCE | Signal Conditioning Equipment |
| NSTL | National Space Technology Laboratory (was MTF) |
| SEC | Secondary |
| ELMCH | Electromechanical |
| TTV | Termination |
| FCMU | Foot Controlled Maneuvering Unit |
| SIS | Shuttle Interface Simulator |
| SSRN | System Software Reference Number |
| ROS | Regulated Oxygen SYstem |
| SSFL | Santa Susana Field Laboratory |
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