| Acronym | Definition |
|---|
| IWTA➣International Water Technology Association |
| IWTA➣International Wheelchair Tennis Association (International Tennis Federation advisory body) |
| IWTA➣International Wireless Telecommunications Association |
| IWTA➣International Wing Tsun Association (Kung Fu association) |
| IWTA➣Interdivisional Work Transfer Agreement |
| IWTA➣Inter Work Transfer Authorization(s) (Lockheed Martin) |