File:Xerox Sigma 9.jpgDescriptionXerox Sigma 9.jpg English: Front of the Xerox Sigma 9. On display at the Living Computer Museum is Seattle, Washington. Date 1 January 2006
File:LCM - Xerox Sigma 9 - 01.jpgDescriptionLCM - Xerox Sigma 9 - 01.jpg English: Xerox XDS Sigma 9 computer, Living Computer Museum, Seattle, Washington, USA. Date 3 April 2014 Source
File:Xerox Sigma 9 Close up.jpgDescriptionXerox Sigma 9 Close up.jpg English: Xerox Sigma 9. On display at the Living Computer Museum in Seattle, Washington. Date 14 January 2006, 01:57:54