| Acronym | Meaning |
 | HAS | Hydraulic Actuation System |
| GA | Gyro Assembly |
| PE | Project Engineer |
| FM | Frequency Modulation (Modulated) |
| IPS | Instrument Pointing System (Subsystem) |
| IDC | Integrated Displays And Controls |
| POL | Petroleum, Oil, And Lubricant |
| TTL | Transistor-Transistor Logic |
| RAM | Research And Applications Module |
| PIC | Pyro Initiator Capacitors |
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