| Acronym | Definition |
|---|
| ZSI➣Zertz Scheid Ingenieurgesellschaft (German: Zertz Scheid Engineering Company) |
| ZSI➣Zintegrowany System Informatyczny (Polish: Integrated Information System) |
| ZSI➣Zoological Survey of India |
| ZSI➣Zentrum für Soziale Innovation (Vienna, Austria) |
| ZSI➣Zolera SOAP Infrastructure |
| ZSI➣Zaurus Software Index |
| ZSI➣Zamil Steel Industries (Dammam, Saudi Arabia) |
| ZSI➣Zeland Software, Inc. (Fremont, CA) |
| ZSI➣Zentralstelle für die Sicherheit in der Informationstechnik (German Information Security Agency) |
| ZSI➣Z Solar Inertial |