spreadsheet format WKn Allyson Lister WKn is a collective name for a spreadsheet format created for Lotus 1-2-3. http://support.sas.com/documentation/cdl/en/acpcref/63184/HTML/default/viewer.htm#a003103772.htm and http://en.wikipedia.org/wiki/Lotus_1-2-3, accessed 3 December 2014. Please note that this is a collective class for all versions of the WKn format, and the specific version required should be created as necessary and placed as a child of this class.