| Abbreviation | Definition |
|---|---|
| PC/XT | Personal Computer/eXtended Technology |
| PCB | Power Control Board |
| PCB | Printed Circuit Board |
| PCCC | Programmable Controller Communications Code |
| PCDU | Photoconductor Development Unit |
| PCE | Power Control Error |
| PCH | PCI (Peripheral Component Interface) Controller Hub |
| PCI | Peripheral Communications Interface |
| PCI | Peripheral Component Interconnect |
| PCIE | Peripheral Component Interconnect Express |
| PCIe | Peripheral Component Interface Express |
| PCI-E | Peripheral Component Interface (PCI) Express |
| PCI-E | Peripheral Component Interface Express |
| PCL | Programmable CLock |
| PCM | Punch Card Machine |
| PCMCIA | Personal Computer Memory Card Interface Adapter |
| PCP | Personal Control Panel |
| PCR | Program Clock Reference |
| PCS | Personal Coherent Source |
| PCS | Personal Communication System |