IOC most commonly refers to the International Olympic Committee.

IOC or IoC may also refer to:

Computing

• IBM Open Class, IBM C++ product

• Indicator of compromise, an artifact likely indicating a computer intrusion

• Inversion of control, a software design pattern

Organizations

• Imperial Orange Council, international council of the Orange Order

• Indian Ocean Commission

• Indian Oil Corporation, large Indian oil and gas company

• Indian Orthodox Church, Kerala, India

• International Olive Council

• Initiative on Cities, urban research institute at Boston University

• Initiatives of Change, international organisation "building trust across the world's divides" (formerly Moral Re-Armament)

• Intergovernmental Oceanographic Commission of Unesco

• International Ornithological Committee, former name of the International Ornithologists' Union

• International Order of Characters, an organization dedicated to improving the fields of aviation and aerospace

• Iron Ore Company of Canada

Other uses

• Icon of Coil, Norwegian electronic music band

• Immediate or cancel, a type of order used on some stock exchanges

• Index of coincidence, the technique in cryptography of counting the number of times that identical letters appear

• Initial operating capability, minimum level of deployment, especially in the US military

• Intraoral camera, a device used to take photos of the inside of a patient's mouth

• Italian organized crime