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.