John - wrong way round on Windows-OS/2
OS/2 wasn't an offshoot of Windows, it was the other way around. In fact, the box for Windows/286 (the precursor of Win 3.0) proudly proclaimed that the "Program Manager looks and feels just like the one in OS/2". Windows was originally just a way to get people with legacy DOS machines ready for the switch to OS/2, which was being jointly developed by IBM and Microsoft at that time. OS/2 2.1 had Win 3.0 built in, and OS/2 Warp had WIndows 3.1 running in it's own memory space, making it a better operator of 16-bit Windows software than Windows 95.