integrity - Jacobian
- internally-threaded pipe end
- internally-upset end
- internals
- international
- international and external economic relations department
- International Association for Water Pollution Research
- international association for water pollution research
- International Association of Classification Societies
- international association of classification societies
- International Association of Drilling Contractors
- International Association of Hydraulic Research
- international association of hydraulic research
- International Association of Hydrogeologists
- international association of hydrogeologists
- International Association of Hydrological Sciences
- international association of hydrological sciences
- International Association of Independent Tanker Owners
- International Association of Physical Oceanography
- international association of physical oceanography
- International Association of Professional Divers
- international association of professional divers
- International Association of Seismology and Physics of the Earth's Interior
- International Association of Testing Materials
- International bank of economic cooperation
- international bulk chemicals code
- international bulk container
- international business machine
- International Chamber of Shipping
- international chemical industry
- international civil aviation organisation
- international code for the safe carriage of grain in bulk
- international code of safety for High-Speed craft
- International Commission on Radiological Protection
- International Commission on Radiological Protection, ICRP
- International commitment for Nondestructive Testing
- International Committee for Nondestructive Testing
- International Conference on Nondestructive Testing
- international convention for safe containers
- International Convention for Safety of Life at Sea (part of the IMO intergovernmental regulations organization)
- International Convention for the Prevention of Pollution from Ships
