Check this article.
Microsoft Is Set to Be Top Foe of Free Code
http://www.nytimes.com/2001/05/03/technology/03SOFT.html
(a free subscription is requiered)
It says that Microsoft quality GPL OpenSource license as "a potencial trap that undercuts the commercial software business and mirrors some of the worst practices of dot- com businesses".
..on the IBM part its says "If we thought this was a trap, we wouldn't be doing it, and as you know, we have a lot of lawyers."
Nice Article to read.
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