P
- P.O.D.
- packet over air
- padded cell
- page in
- page out
- pain in the net
- paper-net
- param
- PARC
- parent message
- parity errors
- Parkinson's Law of Data
- parm
- parse
- Pascal
- PascalCasing
- pastie
- patch
- patch pumpkin
- patch space
- path
- pathological
- payware
- PBD
- PD
- PDP-10
- PDP-11
- PDP-20
- PEBKAC
- peek
- pencil and paper
- Pentagram Pro
- Pentium
- peon
- percent-S
- perf
- perfect programmer syndrome
- Perl
- person of no account
- pessimal
- pessimizing compiler
- peta-
- pffft
- PFY
- phage
- phase
- phase of the moon
- phase-wrapping
- PHB
- phreaker
- phreaking
- pico-
- pig-tail
- pilot error
- ping
- Ping O' Death
- ping storm
- pink contract
- pink wire
- pipe
- pistol
- pixel sort
- pizza box
- plaid screen
- plain-ASCII
- Plan 9
- plan file
- platinum-iridium
- playpen
- playte
- plokta
- plonk
- plug-and-pray
- plugh
- plumbing
- PM
- point release
- point-and-drool interface
- pointy hat
- pointy-haired
- poke
- poll
- polygon pusher
- POM
- ponytail
- pop
- poser
- post
- postcardware
- Postel's Prescription
- posting
- postmaster
- PostScript
- pound on
- power cycle
- power hit
- pr0n
- precedence lossage
- pred
- prepend
- prestidigitization
- pretty pictures
- prettyprint
- pretzel key
- priesthood
- prime time
- printing discussion
- priority interrupt
- profile
- progasm
- proggy
- proglet
- program
- Programmer's Cheer
- programming
- programming fluid
- propeller head
- propeller key
- proprietary
- protocol
- provocative maintenance
- prowler
- pseudo
- pseudoprime
- pseudosuit
- psychedelicware
- psyton
- pubic directory
- puff
- pumpkin holder
- pumpking
- punched card
- punt
- Purple Book
- purple wire
- push
- Python