http://msmvps.com/blogs/mikehall/archive/2009/06/20/pc-personal-computer-or-politically-correct.aspxBack when.. DOS The choices were: DR-DOS MS-DOS And the winner was… MS-DOS . DR-DOS was probably better, but Digital Research didn’t respond to IBM, and Microsoft did. IBM supplied their own version of MS-DOS only on their own computers. Why didn’t DigitalenCommunityServer 2008.5 SP2 (Build: 40407.4157)