GSI
GSI stands for:
- GSI Helmholtz Centre for Heavy Ion Research, formerly the Society for Heavy Ion Research
- Scholl - Institute for Political Science
- Society Switzerland - Israel
- GSI - Special Forces Gothenburg ( Johan Falk - groups promote särskilda Insatser ), a Swedish crime series
- Society for Welding Technology International Ltd., Federation of Welding Technology Research in Germany
- Grand Sport Injection, a sports car series from Opel
- Grid Security Infrastructure, a security framework which is used, among other grid computing middleware such as the Globus Toolkit for authentication and authorization.
- The Gustav -Stresemann Institute, a training and conference center in Bonn
- GSI (file format), with measuring instruments from Leica Geosystems
- GSI Commerce
- Disambiguation
- Abbreviation