thumb|left|Share of the Bibliographisches Institut AG, issued 30 November 1921
The was a German publishing company founded 1826 in Gotha by Joseph Meyer. It moved to Hildburghausen in 1828 and to Leipzig in 1874.
The buildings of the company were completely destroyed by the bombing raids on Leipzig 1943/1944; the company itself was expropriated by the communist regime of East Germany in 1946 and turned into a publicly owned enterprise (). The shareholders moved the company to Mannheim in West Germany in 1953 (). Titles like , , and appeared again. In Leipzig remained the , operating in the same field, publishing , etc.
In 1984 amalgamated with its biggest competitor in the market of reference works, of Wiesbaden to ,
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