| 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 |