| Acronym | Meaning |
| OGS | Oxygen Generation System |
| SHLB | Simulation Hardware Load Boxes |
| GG | Gas Generator |
| P/C | Pitch Control |
| MSBLS | Microwave Scanning Beam Landing System |
| TECH | Technical |
| ARS | Archive And Retrieval Subsystem (PPCU) |
| MP&C | Maintenance Planning And Control |
| SCIM | Standard Cubic Inches Per Minute |
| GFS | Government Furnished Software |