<p>Fortune magazine put out its "50 Most Powerful Women's in Business" list today, which was topped by IBM CEO Ginni Rometty.</p><p>The nod to the leader of the longtime tech giant was followed by Hewlett-Packard CEO Meg Whitman at the No. 3 slot, Facebook COO Sheryl Sandberg at No. 8 and Oracle President and CFO Safra Catz at No. 10.</p><p>But it was shockeroo media magnet Marissa Mayer who claimed a very elegant solo photo on the cover, as well as the No. 14 slot. She is also the youngest woman on the list at 37 years old.</p><p>Mayer the former Google exec whom Fortune correctly characterized as having been "somewhat marginalized" after 13 years at the search giant in its write-up took over the troubled Yahoo in July. Since then, she has since been making a series of dramatic cultural changes at the Silicon Valley icon as she preps for the more structural ones to come soon (and perhaps even before her first child is due on early October).</p><p><a href="http://allthingsd.com/20120920/fortunes-most-powerful-women-features-techies-ibms-rometty-tops-list-but-yahoos-mayer-grabs-cover/">Keep reading...</a></p>