2P may refer to: __NOTOC__ Science 2P/Encke, official designation of Comet Encke 2p, an arm of Chromosome 2 (human) 2p, an atomic orbital for electrons Two-photon absorption Two-photon excitation microscopy
Transportation Airphil Express, a Philippines airline, IATA code 2P LMS Class 2P 4-4-0, a British locomotive
Other 2P, a 408mm artillery piece from the Soviet Union Two pence (British decimal coin), currently circulating 2P, rapper 2 Pistols 2P reserves, proven reserves of fossil fuels 2P, meaning "player 2" in fandoms which can include inverting a character's personality and appearance 2P, meaning "Second-Party" as a digital sales model sitting between first-party (1P) supplier relationship and third-party (3P) independent seller relationship, notably as partner/seller of record on Amazon for brands.
See also P2 (disambiguation)