| Acronym | Meaning |
| SOFI | Spray-on Foam Insulation |
| RCCA | Rough Combustion Cutoff Assembly |
| OTH | Over-the-Horizon (.Radar) |
| DDPC | Digital Data Processing Center (Complex) |
| N2 | Nitrogen |
| IDSD | Institutional Data System Division (JSC) |
| EL | MECH Electromechanical |
| IPS | IRL Initiating Reference Letter |
| EKG | Electrocardiogram (Record) |
| INTRLVR | Interleaver |