Professor WINDOWS (1990) 0 Education DOS

Professor WINDOWS, from INDIVIDUAL Software Incorporated, was a best selling Training program for and about Microsoft Windows 3.0. There was also a "Professor DOS"

• Win 3.0

The Twin (1986) 0 Spreadsheet DOS

"The Twin", from Mosaic Software, is a spreadsheet that touts compatibility and visual similarity with Lotus 1-2-3. better graphics, a much lower price, and was not copy protected. It was a little slower than Lotus 1-2-3, but this was less of an issue for budget users. The Twin, along with Paperback VP-Planner and Borland Quattro Pro were the subject of a lawsuit claiming that duplicating the "look and feel" violated Lotus's copyrights.

• 1.x
• 2.x