IB
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IB or ib may stand for:
- the IATA code for Iberia Airlines
- Ibuprofen
- Informationsbyrån, a former Swedish intelligence agency.
- Intelligence Bureau, Indian internal intelligence.
- International Baccalaureate, or the IB Diploma Programme
- International Bureau, an organ of the World Intellectual Property Organization
- Abbreviation for the city Imperial Beach, California. Located in the extreme Southwestern Corner of the United States.
- Short for ibid or ibidem