| Acronym | Meaning |
 | HAC | Heading Alignment Circle |
| DL | Downlink |
| ORB | 1 -g Orbiter One-g (trainer) |
| QPSK | Quadrature Phase Shift Key |
| SADEC | SAES |
| ICMO | Integrated Configuration Ianagement Office |
| PGSE | Payload Ground Support Equipment |
| CS | Common Set |
| ILC | Initial Launch Capability |
| LA | Lanthanum |
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