| Acronym | Meaning |
 | TPS | Thermal Protection Subsystem |
 | OMR | Operations And Maintenance Requirements |
 | F | Failure |
 | PPL | Provisioning Parts List |
 | DISC | Disconnect |
 | MBL | Mobile Unit (TACAN Station) |
 | HIM | Hardware Interface Module |
 | K-SPS | KSC Shuttle Project Specification |
 | SES | SPecial Emphasis Study |
 | MDS | Minimum Discernible Signal |