PP

Look up PP, pp, pp., or Appendix:Variations of "pp" in Wiktionary, the free dictionary.

PP, pp or P_p may refer to:

Computers and computing

Length between perpendiculars ("pp" or "p/p"), a nautical term
Vitamin PP, also known as Nicotinamide
Pancreatic polypeptide, a substance produced by the body during the process of digestion
- PP cell, cell producing pancreatic polypeptide
Peak to peak (p–p), a way of measuring the amplitude of a signal
Percentage point
Perplexity, a measurement in information theory
Per protocol population in clinical trials
Polypropylene, a very common plastic polymer
PP (complexity), probabilistic polynomial time complexity class
P–P plot
Process performance index (P_p), a tool used in statistical calculations
Proton–proton chain reaction, in nuclear physics

Planned Parenthood, a reproductive health organization
As either pp or p.p., standing for per procurationem, from the Latin by agency – used when signing on behalf of someone else
Pages (plural), in publishing, from Latin paginae, see Acronym and initialism#Representing plurals and possessives
Past participle, a form of a verb which is used in a sentence to modify a noun or noun phrase, often represented by "pp." in dictionaries
Pianissimo (very quiet), a term of musical dynamics
Walther PP, a semi-automatic pistol
Kevin "PPMD" Nanney, professional Super Smash Bros. Melee player
Peter Principle
PediaPress
Pippi Longstocking a fictional character