IWCA
| Acronym | Definition |
|---|---|
| IWCA | International Window Cleaning Association |
| IWCA | International Writing Centers Association |
| IWCA | Independent Working Class Association (UK) |
| IWCA | International Workshop on Cometary Astronomy |
| IWCA | Idaho Weed Control Association |
| IWCA | Irish Wolfhound Club of America, Inc. (Tabernacle, NJ) |
| IWCA | International World Calendar Association |
| IWCA | International Women's Contact Antwerp (Belgium) |
| IWCA | Inside Wiring Cable |