REDMOND'S SHADOW. The real threat, however, is Microsoft, which is also making the same move. While Rational has long been allied with Microsoft, the software giant now shows every sign of developing its own tools. Without IBM's marketing muscle and corporate customer base to sell to, over the course of several years Microsoft could walk away with much of the business Rational now does for it. Rational "needs to be closer to IBM," warns Gilpin. IBM's Rational Self-Interest
Hopefully the link will work for you!