| | PCB | | polychlorinated biphenyl |
| | PCB | | printed circuit board |
| | PCIX | | Peripheral Component Interconnect at (133Mhz) |
| | PCIX | | Permission-based Customer Information Exchange |
| | PCMCIA | | Personal Computer Memory Card International Association |
| | PCO | | Please Carry On |
| | PCYLIHOONL | | Please Cross Your Legs , I Have Only One Nail Left |
| | PCYLIHOONL | | Please Cross Your Legs, I Have Only One Nail Left |
| | pd | | paid |
| | pd | | public domain |
| | PDA | | personal digital assistant |
| | PDA | | property damage accident |
| | PDA | | public display of affection |
| | PDF | | portable document format |
| | PDN | | public data network |
| | PDOP | | position dilution of precision |
| | pdpmea | | please don't post my email address |
| | pdpmea | | please don't publish my email address |
| | PDPMEMA | | Please Don't Publish My E-Mail Address |
| | PDS | | please don't shoot |
| | PDS | | please don't shout |
| | PDS | | please don’t shoot |
| | pdstm | | please don't shoot the messenger |
| | PDT | | Pacific Daylight Time |
| | PE | | Physical Education |
| | PEBKAC | | Problem Exists Between Keyboard And Chair |
| | PEBKC | | Problem Exists Between Keyboard and Chair |
| | PEBMAC | | Problem Exists Between Monitor And Chair |
| | PEBR | | pre-existing business relationships |
| | PEKUSH | | Press Every Key Until Something Happens |
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