| Acronym | Definition |
|---|
| ISWI➣International Space Weather Initiative |
| ISWI➣International Student Week in Ilmenau (Germany) |
| ISWI➣Interactive Systems Worldwide, Inc. (est. 1995; New Jersey) |
| ISWI➣I Stand with Israel |
| ISWI➣Ikatan Sarjana Wanita Indonesia (Indonesian: Indonesian Women Scholars Association) |
| ISWI➣International Sports Wagering, Inc. (Nevada) |