| Acronym | Meaning |
| MHE | Material Handling Equipment |
| UMBC | Umbilical Cord Cable |
| LSP | Least Significant Portion |
| HTS | Heat Transport Section |
| PEFO | Payload Effects Follow-on Study |
| RCC | Reusable Carbon-Carbon |
| V | Valve |
| ITI | Inspection And Test Instruction |
| RTC | Real-Time Computer |
| MGSE | Mechanical Ground Support Equipment |