GSI

GSI may refer to:

Organisations

Geological and geographical

• Geological Survey of India, established in 1851, is a government organisation in India which is an office attached to the Ministry of Mines of Union Government of India for conducting geological surveys and studies
• Geographical Society of Ireland, founded in 1934 to promote geographical studies in Ireland and welcomes as members all persons interested in the subject
• Geological Survey of Ireland
• Geological Survey of Israel, see Jerusalem stone
• Geographical Survey Institute of Japan

Other organisations

• Geophysical Service Incorporated, a petroleum exploration corporation
• Gesellschaft für Schwerionenforschung, a German heavy ion research laboratory
• GSI Commerce, a shopping website design company
• GSI Outdoors, an outdoors cookware company
• Guangzhou Shipyard International, a shipbuilding state-owned enterprise in China
• General Steel Holdings Inc

Science and technology

• Geological Strength Index, system, proposed in 1995, is used for the estimation of the rock mass strength and the rock mass deformation modulus
• Gemstone Spectral Imaging, a software that reduces artifacts in CT scans
• Grid Security Infrastructure, a specification for tamperproof computer networks
• Government Secure Intranet, the system for managing secure access to e-mail and other services for UK government departments
• Gonadosomatic Index, the calculation of the gonad mass as a proportion of the total body mass
• Global System Interrupt, in Advanced Configuration and Power Interface

Other uses

• Graduate student instructor, a teaching fellow