IBM TopView
Computer software
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TopView is the first object-oriented, multitasking, and windowing, personal computer operating environment for PC DOS developed by IBM, announced in August 1984 and shipped in March 1985. TopView provided a text-mode operating environment that... Wikipedia
Initial release: March 1985; 39 years ago
License: Proprietary software
Default user interface: Text-based (text mode)
Latest release: 1.12 / April 2, 1987; 37 years ago
Source model: Closed source