OCI may refer to: Businesses and organizations OCI (company), green energy and chemical company, South Korea Oakwood Collegiate Institute, Toronto, Canada Office of Criminal Investigations of the U.S. Food and Drug Administration Olympic Council of Ireland, the national olympic committee of Ireland Ontario Cancer Institute, Canada Order of the Crown of Italy, Italian order Open Constitution Initiative, advocacy group in China Orascom Construction Industries, construction and fertilizer company, Egypt Ottawa Collegiate Institute, now Lisgar Collegiate Institute, Canada Organisation Communiste Internationaliste, (Internationalist Communist Organisation), former French political party Organisation de la Coopération Islamique, (Organisation of Islamic Cooperation), international organization Computing Open Catalog Interface, an interface standard in computing Open Container Initiative, a Linux standards project in computing Oracle Call Interface, database interface software Oracle Cloud Infrastructure, an on demand cloud computing platform Other uses oci, ISO 639-1/2 language code for Occitan language Online Compliance Intervention, unlawful method of automated debt assessment Organizational Conflict of Interest in capitalism theory Other comprehensive income, part of Accumulated other comprehensive income in U.S. accounting Overseas Citizen of India, a scheme granting a status similar to, but not the same as, dual citizenship in India See also Ocicat, a breed of cat