Artifact Details Title Sigma interface design manuals Catalog Number 102687553 Type Document Description Includes documents: SDS Sigma computer systems: Interface design manual (Oct. 1966) XDS Sigma computer systems: Interface design manual (June 1970) Date 1966 - 1970 Publisher Xerox Data Systems, Inc. (XDS) Extent 100 p. Category Manual Collection Title Buckholtz, Desaussure and Michael collection Credit Gift of Thomas J. Buckholtz and Helen T. Buckholtz Lot Number X2592.2004