| Acronym | Meaning |
 | OCDU | Optics Coupling Data Unit (G&N) |
| IC/ES | Intercommunication/Emergency Station |
| GNCTS | GNGNCTSGN&C Test Station |
| OPSS | Orbital Propellant Storage Subsystem |
| DOL | Department Of Labor |
| PTCS | Propellant Tanking Computer System |
| SOH | Start Of Heading |
| RPA | Request For Procurement Action (Authorization) |
| ETC | Estimate To Completion |
| MER | Meridian |
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