Siemens AG
Siemens was founded in 1847 as Siemens & Halske.
In 1966, Siemens & Halske, Siemens-Schuckertwerke and Siemens-Reiniger-Werke merged to form Siemens AG.
In 1991, Siemens acquired Nixdorf Computer AG and renamed it Siemens Nixdorf Informationssysteme AG, in order to produce personal computers.
Wikipedia information