OIC (disambiguation)
- Commanding officer
- Lt. Warren Eaton Airport
- Offer in compromise
- Office of Intelligence and Counterintelligence
- Officer in Charge (Philippines)
- Oklahoma Intercollegiate Conference (1914–1928)
- Oklahoma Intercollegiate Conference (1974–1997)
- Open Interconnect Consortium
- Opioid intervention court
- Opioid-induced constipation
- Opportunities Industrialization Center
- Order of the Imitation of Christ
- Organisation of Islamic Cooperation
- Orkney Islands Council
- Outline in Color
- Perindopril
- UIC (disambiguation)
- United States Department of Justice Office of Special Counsel