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When IBM Was The Center of Gravity
thediff.co
In 1953, UNIVAC was basically the only company selling computers commercially. By 1956, IBM’s market share in computers was 85%.
In the late 70s and early 80s, after several industry transitions, the entry of smaller and more agile competitors like DEC and Control Data as well as larger and more resourceful ones like GE and Exxon, IBM’s market share was still 70%.