WISI
| Acronym | Definition |
|---|---|
| WISI | Workshop on Intelligence and Security Informatics |
| WISI | Web Information-Seeking and Interaction (workshop) |
| WISI | Western International Securities Inc. (Pasadena, CA) |
| WISI | Water Industry Stock Index (finance) |
| WISI | Web & IT (Information Technology) Solutions International (South Africa) |
| WISI | Wavionix Innovative Solutions International |