1. Academia and education

2. Associations

3. Business

4. Fiction

5. Medical

6. Science and technology

7. Other uses

IBS may stand for:

Academia and education

• 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

Associations

• Institute of Broadcast Sound, a UK broadcasting professional association
• {{lang|pl|Instytut Badań Strukturalnych}}, the Institute for Structural Research in Warsaw, Poland
• Intercollegiate Broadcasting System, an organization of non-profit, education-affiliated radio stations
• International Bank of Settlements, the international central bank of central banks
• 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

Business

• International Builders' Show, an annual trade show organized by the National Association of Home Builders
• International Business Systems, a supply chain management company
• Internet Broadcasting, a web design firm focused on broadcast television

Fiction

• 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

Medical

• Ichthyosis bullosa of Siemens, a genetic skin disorder
• Irritable bowel syndrome, a disorder of the bowel

Science and technology

• Ideal body size, a component of the figure rating scale
• Identical by state, a genetic term also known as non-identical by type (NIBT)
• Institute for Basic Science, a South Korean government-funded basic science institute
• 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

Other uses

• Iman Budhi Santosa, an Indonesian poet
• Industrialised Building System (IBS), a term used in Malaysia for a technique of construction

• The Sisters of Perpetual Indulgence
• The Site
• The Sith'ari
• The Sittaford Mystery
• The Situation
• The Situation Room
• The Sitwells
• The Six Bullerby Children
• The Six-Day War
• The Six Enneads
• The Six Masters
• The Six Million Dollar Man
• The Six Parts Seven
• The Six Shooter
• The Sixteen
• The Sixteen-Millimeter Shrine
• The Sixth
• The Sixth Day
• The Sixth Day: Single Collection
• THE SIXTH DAY 〜SINGLE COLLECTION〜
• The Sixth Sense
• The Six Wives of Henry VIII (1970 TV series)
• The Six Wives of Henry VIII (album)
• The Six Wives of Henry VIII (book)
• The size of Belgium