1. PATA: Parallel ATA.
  2. PC: Personal Computer.
  3. PCB: Printed Circuit Board.
  4. PC DOS: Personal Computer Disk Operating System.
  5. P2P: Peer-To-Peer.
  6. PAN: Personal Area Network.
  7. PAP: Password Authentication Protocol.
  8. PCI: Peripheral Component Interconnect.
  9. PCIe: PCI Express.
  10. PCL: Printer Command Language.
  11. PERL: Practical Extraction and Reporting Language.
  12. PIO: Programmed Input/Output.
  13. PLC: Power Line Communication / Programmable Logic Controller.
  14. Pnp: Plug-and-Play.
  15. PGA: Pin Grid Array.
  16. PHP: PHP: Hypertext Preprocessor.
  17. PIC: Peripheral Interface Controller / Programmable Interrupt Controller.
  18. PINE: Program for Internet News & Email.
  19. PoE: Power Over Ethernet.
  20. POST: Power-On Self Test.
  21. PPC: Power PC.
  22. PPI: Pixels Per Inch.
  23. PPP: Point-to-Point Protocol.
  24. PPPoA: PPP over ATM.
  25. PPPoE: PPP over Ethernet.
  26. PPTP: Point-to-Point Tunneling Protocol.
  27. PSU: Power Supply Unit.