Microsoft controls IBM's destiny ..

Operating Systems Direction Issues
David Reed
6/4/90

The central issue in the operating system directions today is the apparent divergence of IBM's oeprating system direction from Microsoft's direction. This creates a very uncertain application development environment. It is not clear today whethr following IBM's systems direction is a profitable direction.

Our overall impression is that IBM has nearly completely post control of the operating systems directions of its systems. Consequently, Microsoft now is in more control of IBM's destiny than ever.

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http://edge-op.org/iowa/www.iowaconsumercase.org/011607/4000/PX04455.pdf

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court documents in the case of Comes v Microsoft.