| Acronym | Meaning |
| HPOTP | High Pressure Oxidizer Turbopump |
| ESR | Engineering Support Request |
| FEID | Functional Engineering Interface Device |
| UCTA | Urine Collection Transfer Assembly |
| RTHS | Real-Time Hybrid System |
| T | Test |
| VEEI | Vehicle Electrical Engine Interface |
| ENCD | Encode |
| HOL | High Order Language |
| PKM | Perigee KickMotor |