| Acronym | Meaning |
| ETC | Estimate To Completion |
| PRR | Preliminary Requirements Review |
| PO | PurchaseOrder |
| H/O | Handover |
| DCSI | Data And Cqntrol Signal Interface |
| N2 | Nitrogen |
| FL | Flowline |
| SI | Center Support Operations (KSC Directorate) |
| SLCC | ERNO Spacelab Configuration Management |
| FPBOV | Fuel Preburner And Oxidizer Valve |