CHM Revolution

www.computerhistory.org · 2026-10-03 · by Long Nguyen ·generic
<p>Watson penned this scathing memo asking how IBM lost “our industry leadership” to a company with “34 people, including the janitor.” Also known as "The Janitor Memo," it shows the impact Control Data Corporation and its computers had on the leadership of IBM.</p>

CHM Revolution

###### ExhibitionSupercomputersCDC 6600’s Five Year Reign

Watson Jr. memo about CDC 6600

Appears In: CDC 6600’s Five Year Reign

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Date 1963-08 Credit Line Courtesy of the IBM Corporate Archive Copyright Owner © International Business Machines Corporation (IBM) Keywords Control Data Corporation (CDC); International Business Machines Corporation (IBM); Watson, Thomas J., 1914-1993 Object ID 500004285

Watson penned this scathing memo asking how IBM lost “our industry leadership” to a company with “34 people, including the janitor.” Also known as "The Janitor Memo," it shows the impact Control Data Corporation and its computers had on the leadership of IBM.

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