
Critical.
Authoritative.
Strategic.
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Authoritative.
Strategic.

1900s: The Computing-Tabulating-Recording Co. (later renamed IBM) opened its first office in Chicago in 1914. This building housed employees of IBM's ITR (time equipment), TM (tabulating machines) and Scale Divisions, whose products are displayed in the lower front windows. IBM remained at Number 233 until 1947, when the branch was relocated to 616 South Michigan Avenue.
Also: CIO Blast from the Past - 110 Years of IBM technology.