Government Offer in compromise, an agreement to reduce debt to the United States Internal Revenue Service Office of the Independent Counsel, an office of the U.S. Department of Justice Office of Intelligence and Counterintelligence, an office of the United States Department of Energy Officer in Charge (Philippines), the specific status of a temporary head of a local government or agency in the Philippines Officer in Command, primarily used in the United States Uniformed Services as well as police and sheriff's departments Opioid intervention court Organisation of Islamic Cooperation, an international organisation of Muslim nations Orkney Islands Council, the local government authority for Orkney, Scotland, United Kingdom
Medicine Opioid-induced constipation Octahydroindole-2-carboxylic Acid (Oic), an intermediary in the synthesis of Perindopril
Music Outline in Color, a rock band from Tulsa, Oklahoma, United States
Organisations Open Interconnect Consortium Opportunities Industrialization Center, a nonprofit adult education and job training organisation headquartered in Philadelphia, Pennsylvania, United States. Order of the Imitation of Christ, a monastic order in the Syro-Malankara Catholic Church
Sports Two incarnations of the Oklahoma Intercollegiate Conference: Oklahoma Intercollegiate Conference (1914–1928), Oklahoma Intercollegiate Conference (1974–1997)
Transportation OIC, the IATA code for Lt. Warren Eaton Airport in Norwich, New York, United States
See also UIC (disambiguation)