IBM didn't want Microsoft to use the Tab key to move between dialog fields
(news.ycombinator.com)
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2.
Only one side will be the true successor to MS-DOS – Windows 2.x
(news.ycombinator.com)
3.
Only One Side Will Be the True Successor to MS-DOS – Windows 2.x
(news.ycombinator.com)
4.
ArcaOS 5.1.2 (based on OS/2 Warp 4.52) now available
(news.ycombinator.com)