| Abbreviation | Definition |
|---|---|
| ITMA | International Toy Magazines Association |
| ITMA | International Transportation Management Association |
| ITMA | International Twelve Metre Association |
| ITRA | Independent Textile Rental Association |
| IUTA | International Ultra Triathlon Association |
| IVA | International VAT Association |
| IVAA | International Virtual Assistant Association |
| IVAA | International Virtual Assistants Association |
| IVAR | Inland Valleys Association of Realtors |
| IVCA | Illinois Valley Contractors Association |
| IVCA | Illinois Venture Capital Association |
| IVCA | Indiana Vector Control Association |
| IVCA | International Veteran Cycle Association |
| IVCA | Irish Veteran cyclists Association |
| IVLA | International Visual Literacy Association |
| IWA | Independent Winegrowers Association |
| IWA | International Water Association |
| IWA | International Watercross Association |
| IWA | International Web Association |
| IWA | International Webmasters Association |