| Acronym | Meaning |
| TDRSS | Tracking And Data Relay Satellite System |
| IUS | International Ultraviolet ExPlorer |
| SFOP | Safety Operating Procedure (KSC) |
| CIU | Communication Interface Unit |
| SCM | Subsystem Configuration Monitoring |
| SSMECA | SSM E Controller Assembly |
| MM | Millimeter |
| HGM | Hot-Gas Manifold |
| EPR | Engine Pressure Ratio |
| ORD | Operational Ready Data |