ISG

ISG may refer to:

Academics

 * Information Security Group, academic information security group in Royal Holloway, University of London
 * Indian School, Al-Ghubra, a K-12 school in Muscat, Oman
 * International School of Geneva, an international school in Geneva, Switzerland
 * International School in Genoa, an international school in Genoa, Italy
 * International School Groningen, an international school in Haren, Netherlands
 * ISG Business School, a business school in Paris, France

Organisations

 * Idaho State Guard, active during World War II
 * Independent Senators Group, a Canadian Senate parliamentary group
 * Interactive Support Group, a defunct CD-I development company
 * International Steel Group, a steel company headquartered in Cleveland, Ohio
 * Interserve Group, a UK construction company
 * Iowa State Guard, active during World War II
 * ISG Ltd, a UK construction company

Transportation

 * Integrated Starter-Generator, part of an automotive start-stop system
 * New Ishigaki Airport (IATA airport code) on Ishigaki Island, Okinawa, Japan

Other uses

 * In situ gasification, a process in underground coal gasification (UCG)
 * Instruction Stream Generator, also called random test generator
 * Interferon-stimulated genes, a varied group of genes that are switched on by interferon to tackle viral infection
 * International Socialist Group, a Trotskyist group and British section of the Fourth International between 1987 and 2009
 * Iraq Study Group, a 2006 congressionally appointed panel charged with assessing the situation in Iraq, also known as the Baker-Hamilton Commission
 * Iraq Survey Group, the 2003–2005 investigative mission in the Iraqi WMD search program that produced the Duelfer Report
 * Irish Sign Language (ISO 639 code )