| Acronym | Meaning |
 | HGS | Hydrogen Gas Saver |
| PATS | Program For Analysis Of Time Series |
| RD | Round |
| PP | Program Performance |
| COMAS | Combined Orbital Maneuvering And Abort System |
| LDEC | Lunar Docking Events Controller |
| MTEE | Electrical Maintenance Test Equipment |
| SCRSY | Serialized Control And Record SYstem |
| OOMM | Organizational Operations And Maintenance Manual |
| MAT | Matrix |
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