| IARC | International Agency For Research On Cancer | - | Medical |
| IBC | International Business Communications | - | Medical |
| IBEX | International Biotechnology EXpo | - | Medical |
| IBF | International Business Forum | - | Medical |
| IBI | Institute For Biotechnology Information | - | Medical |
| ICES | International Council Of Electrophoresis Societies | - | Medical |
| ICGEB | International Centre For Genetic Engineering And Biotechnology | - | Medical |
| ICHG | International Congress Of Human Genetics | - | Medical |
| ICPEMC | International Commission On Protection Against Environmental Mutagens And Carcinogens | - | Medical |
| ICRF | Imperial Cancer Research Fund | - | Medical |
| IEEE | Institute Of Electrical And Electronics Engineers | - | Medical |
| IG | IntelliGenetics | - | Medical |
| IGES | International Genetics Epidemiology Societies | - | Medical |
| IJCAI | International Joint Conference On Artificial Intelligence | - | Medical |
| IMA | Institute For Mathematics And Its Applications | - | Medical |
| IMACS | International Association For Mathematics And Computers In Simulation | - | Medical |
| IMAGE | Integrated Molecular Analysis Of Gene Expression | - | Medical |
| IMGS | Intl. Mammalian Genome Society | - | Medical |
| INRIA | French Natl. Inst. For Research In Computer Science And Control | - | Medical |
| IOM | Institute Of Medicine | - | Medical |
| IOR | Institute Of Religion | - | Medical |
| ISAG | Intl. Society For Animal Genetics | - | Medical |
| ISMB | Intelligent Systems For Molecular Biology | - | Medical |
| ISONG | Intl. Soc. Of Nurses In Genet. | - | Medical |
| ISQL | Interactive Standard Query Language | - | Medical |
| ISTR | Institute For Science Training And Research | - | Medical |
| IU | Indiana University | - | Medical |
| IUBMB | Intl. Union Of Biochemistry And Molecular Biology | - | Medical |
| IVD | In Vitro Diagnostic | - | Medical |
