OPC

Template:Sister project 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

• Offshore Patrol Cutter
• Ontario Police College
• O-Pee-Chee, a Canadian sports card company
• Ontario Pioneer Camp, in Huntsville, Ontario, Canada
• 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