Pp
PP, pp or Pp may refer to:
Arts and entertainment
- Pianissimo, a term meaning very quiet, from musical dynamics
- Pippi Longstocking, a fictional protagonist in a series of children's books by Swedish author Astrid Lindgren
- Kevin "PPMD" Nanney, professional Super Smash Bros. Melee player
Businesses and organizations
Political parties
- People's Party (Spain) (Partido Popular)
- Pirate Party (Global)
- Progressistas (Brazil) (Progressistas)
- Progressive Party (Iceland)
- People's Partnership (Trinidad and Tobago)
Other businesses and organizations
- PayPal, an American company operating a worldwide electronic online payments system
- PediaPress, a software development and print-on-demand company located in Mainz, Germany
- Planned Parenthood, a reproductive health organization
Religion
- Papa (Latin for "pope"), when written "PP."
- Parish Priest, sometimes used by clergy as post-nominal e.g. when signing a register of services (mainly in UK during first half of 20th century)
Science, technology, and mathematics
Biology and medicine
- Vitamin PP, the amide of nicotinic acid, also known as Nicotinamide
- Pancreatic polypeptide, a substance produced by the body during the process of digesting
- Per protocol population, in clinical trials
- Preteen pregnancy
Computing
- PP (complexity), a probabilistic polynomial time complexity class
- PP-format (Post Processing Format), a file format for distributing meteorological data, developed in the UK
- PP X.400, an e-mail protocol
- Plug and play (P&P), a type of peripheral device
Mathematics
- PP (complexity), a probabilistic polynomial time complexity class
- P–P plot, a probability plot which plots two cumulative distribution functions
- Percentage point, in statistics
- Perplexity, a measurement in information theory
- Process performance index (Pp), a tool used in statistical ppp
Other uses in science and technology
- Walther PP, a semi-automatic pistol
- Length between perpendiculars ("pp" or "p/p"), a nautical term
- Partial pressure, the pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own
- Peak to peak (p–p), a way of measuring the amplitude of a signal
- Polypropylene, a common plastic polymer
- Proton–proton chain reaction, in nuclear physics
Other uses
- Per procurationem, from the Latin for "by agency", used when signing on behalf of someone else
- Pages (plural), in publishing (pp. particular pages), from Latin paginae, see Acronym and initialism#Representing plurals and possessives
- Past participle, a verb form used to indicate the passive voice or perfect tense
- Peter Principle, a concept in management theory
See also
- Peepee (disambiguation)