| Acronym | Meaning |
| IWG | Investigator Working Group |
| IAL | International Algebraic Language |
| MPIIN | Modification Procurement Instrument Identification |
| JAN | Joint Army-Navy |
| QPS | Quality Planning Specification |
| GEOSEPS | General Summary Edit Program |
| NAS | National Aircraft Standard |
| ROTI | Recording Optical Tracking Instrument |
| OTS | Orbiter Test Conductor |
| INSTRUMENT | Group SuPport Equipment |