| Acronym | Meaning |
| ESA | Engineering SuPPort Assembly |
| DBGMP | DBIUData Bus Interface Unit |
| PRSD | Power Reactant Storage And Distribution |
| DAS | Data Acquisition System |
| RCS | Reaction Control System (Subsystem) |
| NC | National Course |
| CDN | CDRDiscrepancyNotice |
| DDL | Data Downlink |
| GML | GeGMLGeneral Measurement Loop |
| FL | Flowline |