IBS most commonly refers to:

• Irritable bowel syndrome, a disorder of the bowel

IBS may also refer to:

• Indiana Boys School, a former name of Plainfield Juvenile Correctional Facility
• Institute for Basic Science, a research institute in Daejeon, South Korea
• Institute of Bangladesh Studies, a research institute in Rajshahi University
• International Bilingual School, a former Japanese private school in the Los Angeles area
• International Biometric Society, an academic statistical association for mathematical and statistical methods in the biosciences
• International Business School, Budapest, a partnership with Oxford Brookes University based in Hungary dating from 1991
• International Business School, Germany, a private institution of post-secondary education located in Nuremberg
• Iowa Braille School
• International Boys' Schools Coalition

• Institute of Professional Sound, formerly Institute of Broadcast Sound, a UK broadcasting professional association
• Instytut Badań Strukturalnych, the Institute for Structural Research in Warsaw, Poland
• Intercollegiate Broadcasting System, an organization of non-profit, education-affiliated radio stations
• International Bible Society, a former name of Biblica, a group that translates and publishes the Bible
• International Boy Scouts, Troop 1, a historic Boy Scout Group in Japan

• International Builders' Show, an annual trade show organized by the National Association of Home Builders
• Iptor Supply Chain Systems, formerly International Business Systems, a supply chain management company
• Internet Broadcasting, a web design firm focused on broadcast television
• LuckyFM Ibaraki Broadcasting System, a commercial radio station in Ibaraki Prefercture, Japan

• IBS, a satirical news channel on the BBC's programme Broken News
• International Brotherhood of Stevedores, a dockworkers union in season two of the TV show The Wire

• Integrated Brier score, a statistical rate

• Ichthyosis bullosa of Siemens, a genetic skin disorder

• Ideal Body Size, a component of the figure rating scale
• Identical By State, a genetic term also known as non-identical by type (NIBT)
• Instruction-based sampling, an implementation of a hardware performance counter used to collect performance data in a superscalar microprocessor
• Integrated bridge system, a navigation related system on ships
• Intrabeam scattering, a collective effect arising in high-intensity particle beams
• Ion-beam sputtering, a type of sputter deposition
• Iron-based superconductor
• Israel Broadcasting Service, former (1951–1965) name of the Israel Broadcasting Authority
• Intelligent battery sensor, a mechatronic component that monitors and measurers battery performance, also known as battery current sensor^[1]

• Isaac Bashevis Singer, a Jewish American novelist
• Iman Budhi Santosa, an Indonesian poet
• Industrialised Building System (IBS), a term used in Malaysia for a technique of construction

This disambiguation page lists articles associated with the title IBS.
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