| Acronym | Meaning |
 | GSFC | Goddard Space Flight Center |
| OP | Oxygen Purge |
| MEC | Mission Events Controller |
| GBS | Ground Based Software |
| KB | Keyboard |
| MAG | Magnitude |
| ETC | Greenbelt |
| GERT | Graphical Evaluation And Review Technique |
| GEOSEPS | General Summary Edit Program |
| MPS | Material Processing Specification |
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