3P or 3p may refer to:
Business and government
People, planet, profit: the triple bottom line Reserves, proven + probable + possible, a category of estimated amount of fossil fuel People's Policy Project, a US think tank Threepence (disambiguation), in coinage Public–private partnership, collaboration between the government and companies/organizations Product planning, product development, and purchasing, such as in the name of the business unit Volvo 3P
Transportation
Tiara Air N.V. (IATA: 3P; ICAO: TNM), an airline headquartered in Oranjestad, Aruba, Dutch Caribbean , a body style of the Fiat 128 car Progress 3P, NASA's name for a Russian cargo spacecraft used to resupply the ISS; in Russian: Прогресс М-44
Science
The small arm of chromosome 3, such as in 3p deletion syndrome ³P, the term symbol for a triplet state with total orbital angular momentum 1 ("principal" in spectroscopic notation) 3p, a subshell atomic orbital
Technology
Three parallel ports, such as in the 3P+S Input/Output Module, a 1976 expansion card by Processor Technology "Programmable Preset Polyphonic", such as in the name of the Roland JX-3P, a Japanese analog synthesizer
Arts and media
3p, a 2019 EP by Artigeardit "3Piece", such as in the name of Angel's 3Piece! (), a Japanese light novel series written by Sagu Aoyama and illustrated by Tinkle
See also P3 (disambiguation) PPP (disambiguation) TP (disambiguation) Third party (disambiguation) Third person (disambiguation)