Institution
- Institute of Cytology of the Academy of Sciences of the USSR1
- Institute of Physics (Great Britain)1
- Institution of Electrical Engineers, INSPEC1
- Instrumentation Specialties Company [Isco, Inc.]1
- Inštitut "Jožef Stefan"1
- Integrated Genetics1
- Intel Capital1
- International CODATA Committee on Electrochemistry, Thermodynamics, and Kinetics 1
- International Centre of Insect Physiology and Ecology1
- International Federation for Information and Documentation1
- International Institute of Cellular & Molecular Pathology1
- International Organization for Standardization1
- International Science and Technology Center1
- International Thompson1
- International Union of Vacuum Science, Techniques and Applications1
- Intersil Corporation1
- Iotron Group1
- Ipatieff High Pressure Laboratory1
- Irvin I. Rubin Plastics Corporation1
- J & TM Aitchison1