| Abbreviation | Definition |
|---|---|
| ISMEBC | International Society for Molecular Electronics and BioComputing |
| ISMIR | International Society for Music Information Retrieval |
| ISMIR | International Society of Music Information Retrieval |
| ISMM | International Society for Mountain Medicine |
| ISMM | Israel Society for Medical Mycology |
| ISMR | International Society for Magnetic Resonance |
| ISMR | International Society for Molecular Recognition |
| ISMS | International Society For Mushroom Science |
| ISMW | Islamic Society of Manly Warringah |
| ISN | International Society for Neuroethology |
| ISNA | Islamic Society North America |
| ISNA | Islamic Society of North America |
| ISNA | Islamic Society of Northern America |
| ISNB | Islamic Society of Northern Baltimore |
| ISNP | Islamic Society of Niagara Peninsula |
| iSNR | International Society for Neuronal Regulation |
| ISNR | International Society for Neutron Radiology |
| ISNS | International Society of Neuro Semantics |
| ISNV | International Society for NeuroVirology |
| ISNW | Islamic Society of Northern Wisconsin |