| Abbreviation | Definition |
|---|---|
| IRAC | Interagency Research Animal Committee |
| ISA | Institut de Sélection Animale |
| ISA | Institute De Selection Animale |
| ISAG | International Society of Animal Genetics |
| ISAS | International Symposium On Animal Science |
| ISESSAH | International Society for Economics and Social Sciences of Animal Health |
| ISHAR | Institute for the Study of Human Animal Relations |
| ITLW | Italian Large White pig breed |
| IVAC | In vivo Animal Core |
| IVAH | Indian Valley Animal Hospital |
| JABB | Journal of Animal Behaviour and Biometeorology |
| JAFS | Journal of Animal and Feed Sciences |
| JARED | Just A Real Elephant Dude |
| JASB | Journal of Animal Science and Biotechnology |
| JATFA | Jimmy and the Forest Animals |
| JCAB | Journal of Cell and Animal Biology |
| JIFA | Jewish Initiative for Animals |
| JPAS | Jefferson Parish Animal Shelter |
| JSAC | Jersey Shore Animal Center |
| JSAH | John Street Animal Hospital |