OPC

OPC may refer to:

Architecture and engineering

 * Optical proximity correction
 * Ordinary Portland cement
 * Organic Photo Conductor, an element used for, among other applications, photocopier and laser printer drums.

Computing

 * Open Packaging Conventions, a container-file technology created by Microsoft to store a combination of XML and non-XML files
 * Open Platform Communications (formerly "OLE for Process Control")
 * OPC Foundation, a related consortium
 * Operations Planning and Control, from Tivoli Software, known as IBM Tivoli Workload Scheduler
 * Optimized Power Control, a method to adjust laser power when writing optical media.
 * Other peoples' computers, reference to privacy issues of cloud computing data being on somebody else's computer rather than your own and potential security issues.

Medicine and natural sciences

 * Ocean Prediction Center
 * Oligodendrocyte precursor cell
 * Oligomeric proanthocyanidin
 * Oropharyngeal cancer

Social matters, politics and government

 * Obama Presidential Center
 * (Federal) Office for the Protection of the Constitution, a translation of the German name Bundesamt für Verfassungsschutz
 * Office of Policy Coordination, a secret U.S. government unit, 1948–1952
 * Office of the Parliamentary Counsel (United Kingdom)
 * Office of the Privacy Commissioner of Canada
 * Online Party of Canada
 * Ontario Progressive Conservative Party, Conservative political party in the province of Ontario
 * Oodua Peoples Congress, militant Yoruba nationalist organization situated in Nigeria
 * Organisation pour la prévention de la cécité (Organisation for the Prevention of Blindness), a French blindness charity working in Africa
 * Orthodox Presbyterian Church, a confessional Reformed Christian denomination
 * Ottawa People’s Commission on the Convoy Occupation, Ontario, Canada
 * Overseas Press Club, a journalists' organization in New York City
 * Overdose prevention centers, otherwise known as Supervised injection sites

Other

 * O-Pee-Chee, a Canadian sports card company
 * Ontario Pioneer Camp, in Huntsville, Ontario, Canada
 * Ontario Police College
 * Opel Performance Center, a division of car manufacturer Opel
 * Optional Payment Charge, a surcharge applied when paying by credit card for airline flights
 * Organic photoconductor drum, used in photocopiers and printers