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Icons of Progress

IBM 1401: The Mainframe

Announced in 1959, the IBM 1401 Data Processing System was heralded as “a machine which opened the computing age to the thousands of businessmen around the world and changed the face of IBM...”
- Think magazine, April 1971.

Behind the 1401

The IBM 1401 Data Processing System was a breakthrough achievement in modern technology, but it’s easy to forget the efforts that went into making it a reality. The chief architect of the 1401, Fran Underwood, and other members of his team reflect on the project and its massive impact: