IB, Ib or ib may refer to:
Organizations Business Iberia (airline) (IATA airline code) Information Builders, a software firm International Bank (Liberia) International business Investment banking Internet Brands Interstate Batteries Intrapreneurial Bricolage
Intelligence FBI Intelligence Branch, the United States Federal Bureau of Investigation's branch in charge of intelligence analysis Intelligence Bureau (India), the domestic intelligence organization of India Intelligence Bureau (Pakistan), the domestic intelligence organization of Pakistan IB, a defunct intelligence agency within the Swedish Army involved in the IB affair
Other The International Baccalaureate, an educational program Intervention Board for Agricultural Produce, a former British government department
Science and technology Inclusion bodies, nuclear or cytoplasmic aggregates of stainable substances, usually proteins Ion beam, a type of charged particle beam I b or I-b, a subtype of Type I supernova; see Type Ib and Ic supernovae IB printing, a Technicolor concept
Computing Imageboard, a type of Internet forum that focuses on posting images InfiniBand, a type of computer network technology Infinite baffle, in loudspeaker enclosure design Information behavior, a subdiscipline within the field of library and information science Interface Builder, a user interface design application on Mac OS X that is part of Xcode Invision Power Board, Internet forum software written in PHP
Medicine and related Ibuprofen, a non-steroidal anti-inflammatory drug Investigator's brochure, a document summarizing pharmacological information about an investigational product Isobuscaline, a psychedelic drug
Places Ib railway station, a station in the Indian Railways system Ib River, a river in India Ib Thermal Power Station, near Jharsuguda, Odisha, India Ibb Governorate (also spelled "Ib"), Yemen International border India–Pakistan border or International Border Imperial Beach, California, United States Ingleby Barwick, a town in North Yorkshire, England
Arts and entertainment Ib (video game), a 2012 video game The Ib Award, presented occasionally by the Danish Film Academy Ib, a variant of the language game Ubbi dubbi Ib, a fictional ancient city in H. P. Lovecraft's story "The Doom That Came to Sarnath" Ib, a title character of Ib and Little Christina, a Hans Christian Andersen fairy-tale
People Ibrahim Coulibaly (1964–2011), Ivorian rebel Ib Holm Sørensen (1949–2012), Danish computer scientist Ibrahim Hussein (artist) (1936–2009), Malaysian artist Ingrid Burley (born 1986), American rapper
Other uses Ib., abbreviation for Latin ibidem ("in the same place") used in references Ib (given name), a Danish male first name Ib (cuneiform), a common-use sign in the Epic of Gilgamesh and other cuneiform texts Ib, "heart", an Ancient Egyptian concept of the soul or spirit Intelligent building, a type of building Itinerarium Burdigalense, the oldest known Christian itinerarium Issue Brief, a type of Congressional Research Service Report