2P
# 2P

2P may refer to:

## 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
* 2p, a two pence British coin
* 2P, rapper 2 Pistols
* 2P reserves, proven reserves of fossil fuels
