| Acronym | Meaning |
 | OMS | Orbital Maneuvering System |
| MA | Maintenance (STS) |
| TMI | Technical Management Items |
| TSB | Twin Sideband |
| ECD | Engineering Control Drawing |
| EOP | Experiments Of Opportunity |
| HQ | Headquarters (HDQ Preferred) |
| NSTL | National Space Technology Laboratory (was MTF) |
| OMIS | Operational Management Information System |
| ISP | Integrated Support Plan |
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