PP

PP, pp or P_p may refer to:

• Peppa Pig, a British preschool animated series (since 2004)
• Police procedural, a subgenre of detective fiction
• Production code for Doctor Who serial The Enemy of the World (1967–1968)
• pp, pages (of a book), an example of the convention of doubling the letters in the acronym to indicate plural words, see Acronym and initialism § Representing plurals and possessives

• Pianissimo, 'very quiet' in musical dynamics
• Peso Pluma, musician
• PinkPantheress, singer

• Patriotic Party (Guatemala)
• People's Party (Spain) (Partido Popular)
• Pirate Party (Global)
• Progressistas (Brazil) (Progressistas)
• Progressive Party (Iceland)
• Prosperity Party (Ethiopia)
• People's Partnership (Trinidad and Tobago)
• We Continue the Change (Bulgaria) ("Prodalzhavame promyanata")

• Pancasila Youth (Pemuda Pancasila), an Indonesian paramilitary organization
• Walther PP, a pistol

• Vitamin PP or nicotinamide
• Paliperidone palmitate, an antipsychotic medication
• Pancreatic polypeptide, a polypeptide secreted by PP cells
  • PP cell or pancreatic polypeptide cell
• pro parte, abbreviated p.p., for a type of synonymy in taxonomy
• Planned Parenthood, a reproductive health organization

• PP (complexity), a probabilistic polynomial time complexity class
• PP-format (Post Processing Format), a file format for meteorological data
• PP X.400, an e-mail protocol
• Plug and play (P&P), a property of a peripheral device
• Microsoft PowerPoint, a presentation program
• PediaPress, a German software company
• PayPal, an online payments company

• P–P plot, a probability plot, in statistics
• Percentage point, in business writing and statistics
• Process performance index (P_p)
• Presque partout (almost everywhere), in measure theory and analysis (is always lower case – 'pp'; in English 'ae' is often used instead.)

• Length between perpendiculars ("pp" or "p/p"), the length of a ship
• Peak to peak (p–p) amplitude of a signal
• Polypropylene, a common plastic polymer
• Proton–proton chain, in nuclear physics and astronomy

• p.p., Per procurationem, when signing on behalf of another
• Percy Pig, a British brand of pig-shaped fruit-flavoured confectionery products
• Pierre Poilievre, Conservative politician in Canada
• pp, Papa Pontifex, post-nominal used by popes
• Philipp Plein, logo
• Paris Principles (cataloging), a theoretical foundation for the creation of bibliographical cataloging rules for libraries