Initialism of postage and packing/packaging. / Initialism of policies and procedures.

(role-playing games) pen-and-paper, usually specifically in reference to the term "pen-and-paper role-playing game", an alternate term for a tabletop role-playing game

(grammar) Alternative form of p.p.

Alternative form of p&p (“postage and packing”) / (linguistics) Initialism of principles and parameters.

(Oxford University slang) Initialism of Port and Policy.

The sixteenth letter of the English alphabet, called pee and written in the Latin script.

The ordinal number sixteenth, derived from this letter of the English alphabet, called pee and written in the Latin script.

(UK) Abbreviation of probationary (used on a vehicle's P-plate) / (Australia) Abbreviation of provisional (used on a vehicle's P-plate) / (anatomy, medicine) Abbreviation of pulmonary.

(computing theory) The set of all problems that are solvable in polynomial time by a deterministic Turing machine / (law) Initialism of patient. (the subject of proceedings in the Court of Protection)

(chiefly US) Alternative spelling of P.M. (“post meridiem”) or PM