DESQview
Software
DESQview is a text mode multitasking operating environment developed by Quarterdeck Office Systems which enjoyed modest popularity in the late 1980s and early 1990s. Running on top of DOS, it allows users to run multiple programs concurrently in... Wikipedia
Developer: Quarterdeck Office Systems
Initial release date: July 1985
License: Proprietary software
Final release: DESQview/2.80
Operating system: DOS