Penicillin (abbreviation)

pcn is also the name of the OpenBSD AMD PCnet-PCI 10/100 Ethernet device driver [1]

Personal Computer Navi, a group that is working on a MegaMan Battle Network series fan "game", or as the proffered definition, simulation.

Putnam City North High School

Penalty Charge Notice, also known as the Politicians Champagne arraNgement.

Polychlorinated naphthalene, an organic pollutant

Potato cyst nematode, an agricultural pest

Pennsylvania Cable Network, non-profit cable television network of Pennsylvania, United States

Program Composition Notation, a language for parallel programming

Partido de Conciliación Nacional, a political party in El Salvador

Partidul Comuniştilor Nepecerişti, a political party in Romania

Pavement Classification Number at airports

Pacific Investment Management PCN (stock symbol), PIMCO Corporate Income Fund of Allianz, Germany

Personal Communications Network, mobile telephone system, Europe