| Acronym | Meaning |
| DME | Distance Measur Ng EquiPment |
| FC | Flight Control |
| MTK | Mechanical Time Keeping |
| SPCC | STS Processing Control Center |
| SCMP | System Contractor Management Plan |
| MDCS | Maintenance Data Collection System |
| SA | Site Activation |
| ER | Explanation Report |
| OHF | Occupational Health Facility |
| HD | Heavy Duty |