International Business Machines Corporation, known by its acronym IBM, is an American multinational computer hardware, software and services company.

The company was formed on 16 June 1911 from the merger of the Computing Scale Company and the Tabulating Machine Company under the name Computing Tabulating Recording Company (CTR). It changed its name to International Business Machines Corporation on 14 February 1924. It was given the nickname Big Blue in reference to the dark blue colour long associated with the company. In the 1970s and 1980s, IBM was the world's largest market capitalisation.