| Acronym | Meaning |
| OIT | Orbiter Integrated Test |
| CIRCUM | Circumference |
| IPS | IRAN Inspection And Repairs As Necessary |
| DCS | Design Criteria Specification |
| ESE | Electronic SuPport Equipment |
| PDRL | Procurement Data Requirements List |
| DARTS | Digital Automated Radar Tracking System |
| TTL | Transistor-Transistor Logic |
| OVLD | Overload |
| CCBD | Configuration Control Board Directive |