| Abbreviation | Definition |
|---|---|
| ISVIR | Indian Society of Vascular and Interventional Radiology |
| ISVM | Indian Society for Veterinary Medicine |
| ISVM | International Society for Viruses of Microorganisms |
| ISVM | International Society of Vertebrate Morphology |
| ISVP | International Society for Vehicle Preservation |
| ISVR | International Society for Virtual Rehabilitation |
| ISVS | Indian Society of Vegetable Science |
| ISW | India Society of Worcester |
| ISW | Islamic Society of Wichita |
| ISWA | International Society for Women in Apologetics |
| ISWA | Islamic Society of the Washington Area |
| ISWE | International Society of Wildlife Endocrinology |
| ISWM | International Society of Weighing and Measurement |
| ISWM | Islamic Society of Western Massachusetts |
| ISWS | International Society for Water Solutions |
| ISZB | International Society for Zinc Biology |
| ITA | Asssociation Internationale des Travaux en Souterrain |
| ITA | International Tunnelling Association |
| ITAA | International Textile and Apparel Association |
| ITCS | International Time Capsule Society |