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Here is the answer:
1) eComStation = Open Source software from Linux + easy to configure + standard simple user interface. So it beats Windows and Linux.
2) eComStation community of users is strong as Macintosh community or BeOS community. The users continue invest money into the developers of shareware applications and porters of software from Linux. Interesting interviews: http://en.ecomstation.ru/community/?action=interviews
eComStation is used in many solutions:
This companies are upgrading IBM OS/2 Warp UP to eComStation 2.0.