OTC

OTC may refer to:

Finance

 * Over-the-counter (finance)
 * One time charge, for example in the big bath technique
 * Order to cash process

Medicine

 * Over-the-counter drug
 * Oxytetracycline

Biochemistry

 * Ornithine transcarbamylase, also called OTC gene or ornithine carbamoyltransferase

Computer science and technology

 * On-tape Catalog, a section of a Microsoft Tape Format file
 * OpenType Collection (OTC), a file format for bundling multiple OpenType fonts
 * Orbiter test conductor, part of NASA's Launch Control Center

Arts, entertainment, and media

 * Offworld Trading Company, a real-time strategy video game
 * The Olivia Tremor Control, a band
 * Opera Theatre Company, merged with Wide Open Opera in 2017 to form Irish National Opera
 * OTC (band), a Congolese soukous group

Brands and enterprises

 * Oliver Typewriter Company, a former US company
 * Open Text Corporation, a Canadian software company
 * Oriental Trading Company, based in Omaha, Nebraska
 * Oshkosh Truck Corporation, former name of the Oshkosh Corporation
 * OTC Markets Group, a private company that provides services to the US over-the-counter securities market
 * OTC Tool Company, originally the Owatonna Tool Company

Education

 * Oakwood Technology College, in Rotherham, South Yorkshire
 * Okefenokee Technical College, in Waycross and Alma, in the US state of Georgia
 * Ozarks Technical Community College, in Springfield, Missouri
 * Roy Campanella Occupational Training Center, public high school in Brooklyn, New York

Government

 * Office of Transportation Cooperatives
 * Ohio Turnpike Commission
 * Oklahoma Tax Commission
 * Overseas Telecommunications Commission, Australia's former international telecommunications service

Military

 * Officer in tactical command
 * Officers' Training Corps

Other organizations

 * Offshore Technology Conference, an organization that holds conferences on offshore energy technology, based in Houston, Texas
 * One Thousand Children, child survivors of the Holocaust who fled to America without their parents
 * Oregon Track Club, an athletic association

Places

 * Bol-Bérim Airport, by IATA-Code
 * Odenton Town Center
 * Ogilvie Transportation Center, Chicago, Illinois
 * Overlake Transit Center
 * United States Olympic Training Center, training facility for US Olympic and Paralympic athletes