- PABG
- Pack A Big Gun
- PBD
- Programmer Brain Damage
- PBM
- Play By Mail (Games)
- PCB
- Please Call Back
- PCYLIHOONL
- Please Cross Your Legs, I Have Only One Nail Left
- PD
- Public Domain
- PDA
- Public Display of Affection
- PDN
- Public Data Network
- PDQ
- Pretty Damn Quick
- PEBCAK
- Problem Exists Between Chair And Keyboard
- PF&HOMW
- Printed, Framed & Hanging On My Wall
- PFM
- Pure Fucking Magic
- PGY
- Post Graduate Year (as in PGY-1, PGY-2 etc. used in PGY Med)
- PIMP
- Pee In My Pants (often in combination)
- PITA
- Pain In The Ass
- PKB
- Pot, Kettle, Black!
- PLBKAC
- Problem Lies Between Keyboard And Chair
- PLMKO
- Please Let Me Know, Ok?
- PLOKTA
- Press Lots Of Keys To Abort
- PMBI
- Pardon My Butting In
- PMETC
- Pardon Me ETC.
- PMFBI
- Pardon Me For Butting In
- PMFBR
- Pardon Me For Being Rude
- PMFJI
- Pardon Me For Jumping In
- PMFJIH
- Pardon Me For Jumping In Here.
- PMJI
- Pardon My Jumping In
- PMYMHMMFSWGAD
- Pardon Me, You Must Have Mistaken Me For Someone Who Gives A Damn
- PMYMHMMFSWGAS
- Pardon Me, You Must Have Mistaken Me For Someone Who Gives A Shit.
- POC
- Prisoner Of Chat; Peeping Other Chatters
- POETS
- Piss On Everything, Tomorrow's Saturday; Piss Off Early, Tomorrow's Saturday
- POITS
- Piss On It Tomorrow's Saturday
- POM
- Phase Of the Moon
- POP
- Point Of Presence; Post Office Protocol
- POQ
- Piss Off Quickly
- POQADCB
- Piss Off Quickly and Don't Come Back!
- POSSLQ
- Person of Opposite Sex Sharing Living Quarters
- POV
- Point Of View
- PPL
- PeoPLe
- PPN
- Programmer Project Number (currently known as UserID)
- PPP
- Petty Pet Peeve; Point to Point Protocol
- PPPP
- Previous Paragraph was Polemical Position
- PS
- Post Scriptum; PostScript; Play Station
- PSX
- Play Station
- PT
- Physical Training
- PTB
- Powers That Be
- PTM
- Please Tell Me
- PTO
- Patent and Trademark Office (US Govt); Please Turn Over
- PW
- Pathetic Wanker; PowWow
- PhD
- Piled Higher and Deeper.
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