| Abbreviation | Definition |
|---|---|
| IVHS | Inland Valley Humane Society |
| IVNS | International Vladimir Nabokov Society |
| IVS | International Viola Society |
| IVSLA | Istituto Veneto di Scienze, Lettere ed Arti |
| IVSLA | Venetian Institute of Sciences, Letters and Arts |
| IVTS | In Vitro Toxicology Society |
| IVU | International Publishers Association |
| IVU | Internationale Verleger-Union |
| IVU | Unin Internacional de Editores |
| IVU | Unión Internacional de Editores |
| IVU | Union internationale des diteurs |
| IVU | Union internationale des éditeurs |
| IVV | Fdration internationale des gomtres |
| IVV | Fédération internationale des géomètres |
| IVV | International Federation of Surveyors |
| IVV | Internationale Vereinigung der Vermessungsingenieure |
| IWS | International watercolor society |
| IWTA | International Wireless Telecommunications Association |
| IXS | International XAFS Society |
| IYSS | Integration Youth Services Society |