GSI may refer to:

Science and technology

Geological Strength Index The Geological Strength Index (GSI) system, proposed in 1994 by Evert Hoek, is used for the estimation of the rock mass strength and the rock mass deformation modulus. The GSI system concentrates on the description of two factors, rock structure ...

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 maturity ...

* 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 Gemological Science International, or GSI, is an independent gemological organization that is one of the largest gemological entities in the world, with offices in four continents. Founded in New York City in 2005 by Mark Gershburg and Debbie Az ...

, gemstone identification/grading/appraisal services *

Geophysical Service Incorporated Geophysical Service Inc. (often abbreviated GSI) was founded by J. Clarence Karcher, John Clarence Karcher and Eugene McDermott in 1930 for the purpose of using refraction and reflection seismology to Hydrocarbon exploration, explore for petroleum ...

, 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 eBay Enterprise, Inc. (formerly GSI Commerce, Inc.) was a multinational e-commerce corporation that specialized in creating, developing and running online shopping sites for brick and mortar brands and retailers. The company also provided a varie ...

, 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 the ...

, Germany *

Geographical Society of Ireland The Geographical Society of Ireland (GSI) Irish: ''Cumann Tíreolaíochta na héireann'' was founded in 1934 to promote geographical studies in Ireland and welcomes as members all persons interested in the subject. Activities The Society hosts s ...

Geospatial Information Authority of Japan The , or GSI, is the national institution responsible for surveying and mapping the national land of Japan. The former name of the organization from 1949 until March 2010 was Geographical Survey Institute; despite the rename, it retains the same ...

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 Grand-Santi Airport is an airport serving the Lawa River port of Grand-Santi, a commune of French Guiana. The airport is east of the river, which forms the border with Suriname. Airlines and destinations Statistics See also *List of ai ...

, French Guiana (IATA code GSI) {{disambiguation