GSI may refer to:

Science and technology

Gonadosomatic Index In biology, the gonadosomatic index (GSI) is the calculation of the gonad mass as a proportion of the total body mass. It is represented by the formula: GSI = onad weight / total tissue weight× 100 It is a tool for measuring the sexual matur ...

* UK

Government Secure Intranet Government Secure Intranet (GSi) was a United Kingdom government wide area network, whose main purpose was to enable connected organisations to communicate electronically and securely at low protective marking levels. It was known for the '.gsi. ...

Grid Security Infrastructure The Grid Security Infrastructure (GSI), formerly called the Globus Security Infrastructure, is a specification for secret, tamper-proof, delegatable communication between software in a grid computing environment. Secure, authenticatable communicat ...

, a computer networking specification

Businesses and organizations

Businesses

* Gemological Science International, gemstone identification/grading/appraisal services *

Geophysical Service Incorporated Geophysical Service Inc. (often abbreviated GSI) was founded by John Clarence Karcher and Eugene McDermott in 1930 for the purpose of using refraction and reflection seismology to explore for petroleum deposits. History On December 6, 1941, t ...

, an American petroleum exploration corporation *

Guangzhou Shipyard International CSSC Offshore & Marine Engineering (Group) Company Limited (COMEC), formerly Guangzhou Shipyard International Company Limited (GSI), is the largest modern integrated shipbuilding enterprise based in Southern China. It was founded in 1954 and is ...

, a Chinese state-owned shipbuilder * GSI Commerce, now eBay Enterprise, an American e-commerce company

Scientific organizations

GSI Helmholtz Centre for Heavy Ion Research The GSI Helmholtz Centre for Heavy Ion Research (german: GSI Helmholtzzentrum für Schwerionenforschung) is a federally and state co-funded heavy ion () research center in the Wixhausen suburb of Darmstadt, Germany. It was founded in 1969 as th ...

, Germany * Geographical Society of Ireland * Geospatial Information Authority of Japan *

Geological Survey of India The Geological Survey of India (GSI) is a scientific agency of India. It was founded in 1851, as a Government of India organization under the Ministry of Mines, one of the oldest of such organisations in the world and the second oldest survey ...

Geological Survey of Ireland Geological Survey Ireland or Geological Survey of IrelandS.I. No. 300/2002 - Communications, Energy and Geological Survey of Ireland (Transfer of Departmental Administration and Ministerial Functions) Order 2002 ( ga, Suirbhéireacht Gheolaíochta ...

Other organizations

* ''Gabinete de Segurança Institucional da presidência da república'' ( Institutional Security Cabinet), Brazil *

Gustav Stresemann Institute The Gustav Stresemann Institute (GSI) is a registered charity and an independent, non-partisan and non-profit institution of civic education. The GSI is in the Bonn neighborhood of Hochkreuz, and operates a conference center with a conference hotel ...

, a German educational charity

Other uses

* Graduate student instructor, a

teaching fellow A teaching fellow (sometimes referred to as a TF) is an individual at a higher education institution, including universities, whose role involves teaching and potentially pedagogic research. The work done by teaching fellows can vary enormously fr ...

at some US universities * Grand-Santi Airport, French Guiana (IATA code GSI) {{disambiguation