| Acronym | Meaning |
 | PC | Printed Circuit (Card) |
| PC | Project Control |
| PC | Pulsating Current |
| PCA | Pitch Control Assembly |
| PCA | Pneumatic Control Assembly |
| PCA | Pneumatic Control Assembly |
| PCA | Point Of Closest Approach |
| PCA | Power Control Assembly |
| PCA | Power Controller Assembly |
| PCB | Power Circuit Breaker |
| PCB | Power Control Box |
| PCB | Printed Circuit Board |
| PCB | Product Configuration Baseline |
| PCC | Pad Control Center |
| PCC | Payload Control And Checkout |
| PCC | Production Control Centers |
| PCCB | Program Configuration Control Board |
| PCCE | Payload Common Communication Equipment |
| PCCM | Program Change ControlManagement |
| PCCN | Provisioning Contract Control Number |
| PCCP | Preliminary Contract Change ProPosal |
| PCD | Procurement Control Document |
| PCDU | Payload Command Decoder Unit |
| PCEM | Propulsion Contamination Effects Module |
| PCF | Payload Control Facility |
| PCG | Phonocardiogram |
| PCI | Peripheral Controller Interface |
| PCI | Procedure Change Unit |
| PCI | Product Configuration Identification |
| PCI | Program Control Input |
| PCIL | Pilot-Controlled Instrument Landing |
| PCIN | Program Change Identification Number |
| PCIN | Program Change Integration |
| PCL | Pallet Coolant Loop |
| PCL | Power Control List |
| PCL | Primary Coolant Line |
| PCL | Primary Coolant Loop |
| PCL | Programming Check List |
| PCM | Power Control Mission |
| PCM | Pulse Code Modulation |
| PCM | Pulse Code Modulation |
| PCM | Pulse Code Modulator |
| PCM | Punch Card Machine |
| PCM | E Pulse-Code Modulation Event |
| PCMD | Pulse-Code Modulation |
| PCMMU | PCM Master Unit |
| PCMMU | Pulse Code Modulation Master Unit |
| PCMMU | Pulse-Code Modulation Master Unit |
| PCMS | Pulse-Code Modulation Shared |
| PCN | Page Change Notice |
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