P (disambiguation)

P is the sixteenth letter of the ISO basic Latin alphabet.

P may also refer to:

• P, in Greek alphabet, the Rho, the lowercase p is also sometimes confused with Rho ρ or ϱ
• P, in Cyrillic alphabet, the Er
• 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

Arts, literature and music

• P (band), 1993-95 American alternative rock band
  • P (album), the 1995 eponymous release by American alternative rock band P
• p in sheet music indicates piano, a dynamic direction to play softly
• P (film), a 2005 Thai film
• "P," a song from the Venetian Snares album Cavalcade of Glee and Dadaist Happy Hardcore Pom Poms
• P, code for the Paris Herbarium at the Muséum national d'histoire naturelle
• P, priestly source of the Hebrew Bible
• P, the ancient Greek author of the Hellenica Oxyrhynchia

Computing

• P(), the usual name for the operation to acquire a semaphore
• <p></p>, the HTML element used to create a paragraph
• P-type semiconductor
• Primitive programming language P′′
• p, a suffix unit for video resolution (vertical Progressive-scan lines), as in 720p or 1080p

Mathematics

• p-value, in statistical hypothesis testing
• P (complexity), a complexity class in computational complexity theory
• #P complexity class
• pico- SI prefix
• Peta- Metric system prefix

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) is a Canadian company friendly builds environmentally friendly hybrid yard locomotives.

Science

• p, the symbol for momentum in physics
• P, the symbol for power (physics)
• Pulse, the rate of heartbeats
• Poise, the unit for dynamic viscosity in the centimetre gram second system of units
• P, the symbol for the chemical element phosphorus
• p, the symbol for pressure
• p, the SI prefix symbol for pico-, 10⁻¹²
• 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
• p designates the short arm of a chromosompp

• ATC code P Antiparasiti products, insecticides and repellents, a section of the Anatomical Therapeutic Chemical Classification System
• pProline, an amino acid abbreviated P or Pro