| Acronym | Meaning |
 | IITCS | Igloo Internal Thermal Control Section |
| GTCU | Ground Thermal Conditioning Unit |
| PT | Pressure Transducer |
| IAD | Interface Analysis Document |
| BCR | Bar Chart Report |
| E/C | Encoder/Coupler |
| G | Units Of Gravitational Force |
| SNSO | Space Nuclear SYstems Office |
| SMDC | Shielded Mild Detonating Cord |
| LL | Lever Lock |
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