http://www.commodore.ca/history/company/turks_geos.htm http://www.commodore.ca/history/company/turks_geos.htm GEOS GEOS 8-bittinen GEOS GEOS History of GEOS for Commodore Computers GEOS http://www.commodore.ca/history/company/turks_geos.htm GEOS: Looking Back GEOS: Looking Back http://www.commodore.ca/history/company/turks_geos.htm GEOS GEOS: Looking Back