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> The promised user interface, Presentation Manager, was introduced with OS/2 1.1 in October 1988.[15] It had a similar user interface to Windows 2.1, which was
by jsjohnst 3y ago
> The promised user interface, Presentation Manager, was introduced with OS/2 1.1 in October 1988.[15] It had a similar user interface to Windows 2.1, which was released in May of that year. (The interface was replaced in versions 1.2 and 1.3 by a look closer in appearance to Windows 3.0.)
To quote the relevant section of parent’s link.