Ten operating system we remember

[Colin_Camper]

I forgot about GEOS. :-)

I don't think Win95 could ever be called OS/2's 'half brother'.
It was basically DOS + Windows3 (32bit) modded to look like it was a gui not cli.
I guess NT was OS/2's half brother - IBM and MS worked on OS/2 together, but when Windows 3.1 was so popular, MS ditched OS/2 and hired a bunch of VMS gurus to develop Windows NT in competition with OS/2.

[Colin_Camper]

I tire of hearing this tripe.

You're the one talking tripe.
DOS 6.2/Win3.12(32bit), Win95 and Win98 were basically the same thing. From Win95 onwards the system was made to look like it was a native gui but in reality it just ran on DOS 7. DOS 7 was developed from DOS 6 to better integrate with windows and to kill the market for alt. Doses like DRDOS. MS didn't lose DOS until consumer windows merged with nt (Windows 2000).