P (disambiguation)

P, or p, is the sixteenth letter of the English alphabet.

P may also refer to:
 * Rho (letter), in Greek alphabet; the lowercase p is also sometimes confused with the lowercase Rho, ρ or ϱ
 * Er (Cyrillic), in Cyrillic alphabet; it is sometimes confused with the Latin letter P
 * siglum for New Testament papyrus with Gregory-Aland number n
 * In linguistics, P (also O), the patient-like argument (object) of a canonical transitive verb
 * Encircled P, or ℗, is the sound recording copyright symbol
 * p., an abbreviation for page when referencing a page number in a print publication
 * Portugal country code in the vehicle registration plates of the European Union
 * Parking, see also Parking (disambiguation).
 * P (Nazi symbol), worn by Polish forced labourers during Nazi occupation
 * P, the aircraft registration prefix for North Korean planes
 * P, an abbreviation of gridiron football position punter

Arts, literature and music

 * P, code for the Paris Herbarium at the Muséum national d'histoire naturelle
 * P, the ancient Greek author of the Hellenica Oxyrhynchia
 * P, the production code for the 1965 Doctor Who serial The Crusade
 * P (film), a 2005 Thai film
 * "P" Is for Peril, a 2001 novel by Sue Grafton
 * P, an abbreviation of Pinxit
 * p or piano, a dynamic direction to play softly
 * P, priestly source of the Hebrew Bible
 * Agent P, the codename for Perry the Platypus in Phineas and Ferb

Music

 * P (band), a 1993–95 American alternative rock band
 * P (album), the 1995 eponymous release by American alternative rock band P
 * "P," a song from the Venetian Snares album Cavalcade of Glee and Dadaist Happy Hardcore Pom Poms
 * "P", a song by American rapper Jaden from his 2019 album ERYS

Computing

 * P, the usual name for the operation to acquire a semaphore
 * , the HTML element used to create a paragraph
 * P-type semiconductor
 * P (programming language), developed by Microsoft and UC, Berkeley
 * Primitive programming language P′′
 * p, a suffix unit for video resolution (vertical Progressive-scan lines), as in 720p or 1080p
 * The P convention in communication

Mathematics

 * p-value, in statistical hypothesis testing
 * P (complexity), a complexity class in computational complexity theory
 * #P complexity class
 * P, universal parabolic constant
 * Pi
 * P or $$\mathbb{P}$$ - the set of all primes and p an individual prime
 * ℘-functions or p-functions, are the Weierstrass elliptic function
 * p-series, a common name for the Harmonic series (mathematics)
 * $P$, Projective space

Money, corporate

 * P (instead of ₱), a symbol often used for the Philippine peso
 * p is a symbol for penny
 * P, the New York Stock Exchange ticker symbol for Pandora Media, Inc., the corporate owner of Pandora Radio
 * P, Panasonic's mobile phones in Japan
 * Railpower Technologies (TSX: P), a Canadian company that builds environmentally friendly hybrid yard locomotives

Science

 * p, the symbol for momentum in physics
 * P, the symbol for power (physics)
 * P, the symbol for proposition
 * Pulse, the rate of heartbeats
 * °P, the unit in descriptions of alcohol proof
 * Poise, the unit for dynamic viscosity in the centimetre gram second system of units
 * Phosphorus, symbol P, a chemical element
 * p, the symbol for pressure
 * p, the SI prefix symbol for pico-, 10−12
 * P, the SI prefix symbol for Peta-, 1015
 * p, approximates the negative common logarithm (base 10) in pH, the measure of acidity or basicity
 * Haplogroup P (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
 * Haplogroup P (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
 * Methamphetamine, nicknamed "P" in New Zealand
 * p designates the short arm of a chromosome
 * ATC code P Antiparasitic products, insecticides and repellents, a section of the Anatomical Therapeutic Chemical Classification System
 * Proline, an amino acid abbreviated P or Pro
 * P-factor, an aerodynamic effect
 * p factor (psychopathology)

Transportation

 * Transilien Line P, a line of the Paris transport network
 * P (Los Angeles Railway)
 * The official West Japan Railway Company service symbol for:
 * JRW kinki-P.svg Sakurajima Line.
 * JRW hiro-P.svg Geibi Line.
 * Nankō Port Town Line, an automated guideway line operated by the Osaka Metro, labeled Osaka Metro Nanko Port Town line symbol.svg

Other uses

 * Papa, the military time zone code for UTC−03:00