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 in 2017 to form Irish National Opera OTC (band), a Congolese soukous group Roman Reigns, a professional wrestler whose nickname is "The OTC"
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
Organizations
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 Oceanside Transit Center Odenton Town Center Ogilvie Transportation Center, Chicago, Illinois Overlake Transit Center United States Olympic Training Center, training facility for US Olympic and Paralympic athletes
See also Oct (disambiguation)