IGC
- Cell nucleus
- Channel Tunnel
- FAI Gliding Commission
- IAPMO Standards
- IGC Centre
- Immortals Gaming Club
- Independent Garden Center Show
- Inquirer Group of Companies
- Instant Game Collection
- Institute for Global Communications
- Instituto Gulbenkian de Ciência
- Intelligent Graphics Corporation
- Intergovernmental Committee on Intellectual Property and Genetic Resources, Traditional Knowledge and Folklore
- Intergovernmental Conference
- Intergranular corrosion
- International Code of the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk
- International Gender Champions
- International Geological Congress
- International Grains Council
- International Growth Centre
- Inverse gas chromatography
- Iraqi Governing Council
- Istituto Geografico Centrale
- VM/386
- Word of Life Bible Church
- World Intellectual Property Organization