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Some are funny, some are just shorthandPIF = Paid In Full
PITA = Pain In The Ass
PMFJI = Pardon Me For Jumping In
PMJI = Pardon My Jumping In
PTP = Pardon The Pun
P911 = Parent Alert
PBB = Parent Behind Back
PIR = Parent In Room
POS = Parent Over Shoulder -or- Piece Of Shit
PAL = Parents Are Listening
PAW = Parents Are Watching
POAK = Passed Out At Keyboard
PTPOP = Pat The Pissed Off Primate
PNATMBC = Pay No Attention To Man Behind the Curtain
PITMEMBOAM = Peace In The Middle East My Brother Of Another Mother
P2U4URAQTP = Peace to you for you are A cutie Pie
PIMP = Peeing In My Pants
PP = People or Party Please
PIN = Person In Need
PONA = Person Of No Account
PM = Personal Message -or- Private Message
POSC = Piece Of Shit Computer
PIAPS = Pig In A Pant Suit
PO = Piss Off
P-ZA = Pizza
PBEM = Play By EMail
PLS = Please
PWP = Plot, What Plot?!
POV = Point of View
PHB = Pointy Haired Boss
PND = Possibly Not Definitely
PS = Post Script
PANS = Pretty Awesome New Stuff
PDQ = Pretty Darn Quick
PTH = Prime Tanning Hours
P&C; = Private and Confidential
PEBCAK = Problem Exists Between Chair And Keyboard
PICNIC = Problem In Chair, Not In Computer
PIBKAC = Problem Is Between Keyboard And Chair
P2C2E = Process Too Complicated Too Explain
PSO = Product Superior to Operator
PD = Public Domain
PDOMA = Pulled Directly Out Of My Ass
PFA = Pulled From Ass -or- Please Find Attached
PMIGBOM = Put Mind In Gear Before Opening Mouth
POAHF = Put On A Happy Face
POOF = Good-bye, also seen as ::poof::
PU = That Stinks