| Acronym | Meaning |
| IML | Inside Mold Line |
| SAM | SAMSShuttle Attachment ManiPulator SYstem |
| DDA | Digital Differential Analyzer |
| SNSR | Sensor |
| RAU | Remote Acquisition Unit |
| OF | Operational FWD DSC Or MDM |
| MMH | Maintenance Man-Hour |
| FBCS | Fixed Base Crew Station (SMS) |
| FMSP | Frequency Modulation Signal Processor |
| MEAR | Maintenance Engineering Analysis Request |