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 maturit ...

* 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 communicati ...

, a computer networking specification * "Global

Systems Integrator A systems integrator (or system integrator) is a person or company that specializes in bringing together component subsystems into a whole and ensuring that those subsystems function together, a practice known as system integration. They also solv ...

", large managed technology services providers *

GS-I The UDP-forming form of cellulose synthase () is the main enzyme that produces cellulose. Systematically, it is known as ''UDP-glucose:(1→4)-β-D-glucan 4-β-D-glucosyltransferase'' in enzymology. It catalyzes the chemical reaction: : UDP-g ...

(Cellulose synthase (UDP-forming)), an enzyme *

Great Sea Interconnector The Great Sea Interconnector, formerly known as the EuroAsia Interconnector was a planned HVDC interconnector between the Greek, Cypriot, and Israeli power grids via the world's longest submarine power cable, with a length of from Israel to Cyp ...

Businesses and organizations

Businesses

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

Geophysical Service Incorporated Geophysical Service Inc. (often abbreviated GSI) was a Texas-based company founded by J. Clarence Karcher, John Clarence Karcher and Eugene McDermott in 1930, for the purpose of using refraction and reflection seismology to Hydrocarbon explorati ...

, 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 () is a federally and state co-funded heavy ion () research center in Darmstadt, Germany. It was founded in 1969 as the Society for Heavy Ion Research (), abbreviated GSI, to conduct research on a ...

, Germany * Geographical Society of Ireland *

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 Ireland (), founded in 1845, is the National Earth Science agency of Ireland. Overview Geological Survey Ireland is a division of the Department of Communications, Climate Action and Environment a ...

Other organizations

Global Security Initiative The Global Security Initiative (GSI, ) is an initiative proposed by Chinese Communist Party general secretary Xi Jinping during the annual Boao Forum on 21 April 2022. Officially, the initiative is meant to "uphold the principle of indivisible ...

* ''Gabinete de Segurança Institucional da presidência da república'' (

Institutional Security Cabinet The Institutional Security Bureau (, GSI; English language, English: ''Institutional Security Bureau of the Presidency of the Republic'', ISB) is an Cabinet of Brazil, executive cabinet office of the federal government of Brazil responsible for ...

), Brazil * Gustav Stresemann Institute, 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 work involves teaching and potentially pedagogic research. The work done by teaching fellows can vary significantl ...

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 a ...

, French Guiana (IATA code GSI)