IBMによる合併買収一覧
↑ "IBM Completes Acquisition of Rational Software" (Press release). IBM. 21 February 2003. 2008年6月2日閲覧。
↑ "IBM Acquires Think Dynamics" (Press release). IBM. 13 May 2003. 2008年6月2日閲覧。
↑ "IBM Acquires Aptrix; Strengthens its Software Portfolio with Web Content Management Software" (Press release). IBM. 15 July 2003. 2008年6月2日閲覧。
↑ "IBM to Acquire CrossAccess Technology, Extends Leadership in Information Integration" (Press release). IBM. 14 October 2003. 2008年6月2日閲覧。
↑ "IBM Acquires Retail Self-Checkout Leader, PSI" (Press release). IBM. 13 November 2003. 2008年6月2日閲覧。
↑ "IBM Acquires Green Pasture Software, Extends Leadership in Enterprise Content Management" (Press release). IBM. 17 December 2003. 2008年6月2日閲覧。
↑ IBM Archives: Computing-Tabulating-Recording Company (1911–1924).
↑ “IBM Archives: Frequently Asked Questions”. 2009年10月25日閲覧。 Some accounts of the merger forming CTR state that four corporations were merged, but the Bundy firm had been integrated into the International Time Recording Company prior to the merger that created CTR.
↑ "IBM Completes Mainspring Acquisition" (Press release). IBM. 7 June 2001. 2008年6月2日閲覧。
↑ "IBM Completes Acquisition of Informix Database Assets" (Press release). IBM. 2 July 2001. 2008年6月2日閲覧。
↑ "IBM Completes Acquisition of CrossWorlds Software" (Press release). IBM. 14 January 2002. 2008年6月2日閲覧。
↑ "IBM Acquires Metamerge, Adds Directory Integration Software to IBM's Infrastructure Portfolio" (Press release).