>>But then again the whole freaking IT boom of the 90's sits on top of their OS, and they are ruthless about protecting their share.
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>I dunno, "whole" is a strong word here. MS thinks the invented everything that has to do with the PC, but I woudln't say that. I'm not a history expert so I'm not gonna get into that here.

I qualified with "boom". I am aware that computers and OS's were there before. But IBM and their PC could not have done it alone without MS DOS (70's-80's) and later Windows (90's).