M$ in einer Nussschale: "This is Microsoft's contribution to the field of computer technology: before they sold BASIC and later DOS to any hardware manufacturer that would buy it, end users were completely dependent on a hardware manufacturer not only for hardware, but also for platform-specific operating systems and application software. Microsoft's marketing strategy put an end to that, and contributed to changing the vertical computer market into a horizontal one. For that the company deserves due credit.

But that's all."