| Acronym | Meaning |
| EVC | Extravehicular Communications |
| IPS | IRAR Internal Variable |
| GSCU | Ground Service Cooling Unit |
| LIE | Left Inboard Elevon |
| CMR | Center Materials Representative |
| OEX | Orbiter Experiments |
| M | PTPMain Propulsion Test Program |
| LOC | Localizer |
| SA | Shaft Angle |
| OCR | Optical Character Recognition |