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DesignCAD is a low end, but well featured, drafting program. It was sometime a companion product to DesignCAD 3D.
SoftKey Key Paint 2000 is a rebadged version of ZSoft PC Paintbrush for DOS. ZSoft was eventually purchased by SoftKey.
Lotus 1-2-3 was an early spreadsheet application available for MS-DOS. It became extremely popular in the late 1980s, displacing the former leader VisiCalc. Lotus had difficulties adapting 1-2-3 to the Windows environment, and was overtaken by Microsoft Excel. Spreadsheet functionality was also included in Lotus Symphony. Later versions were included in Lotus SmartSuite.