(Fortune) -- Cathleen Black, President of Hearst Magazines, ranks No. 38 on Fortune's 2006 list of 50 Most Powerful Women.

In a tough time for print media, Hearst has expanded to 164 international editions, including Esquire in Russia and Seventeen in Turkey. It is also making an aggressive push online. Ad revenues are up, but two recent launches, SHOP ETC. and Weekend, were shuttered.

By the key criteria Fortune uses in assembling its annual list - the size, importance, and health of each business in the global economy, and the momentum of each woman's career (along with her social and cultural influence) - there's no question that the power of women in the corporate sphere is rising.

Indeed, it could be called the year of the Most Powerful Woman CEO. The top seven positions on Fortune's 2006 Most Powerful Women list are held by CEOs.

Some other powerful women on the list include: Sallie Krawcheck, Citigroup (Charts); Susan Arnold, Procter & Gamble (Charts); Charlene Begley, General Electric (Charts); Mary Minnick, Coca-Cola (Charts); Linda Dillman, Wal-Mart (Charts); and Meg Whitman, eBay (Charts).

Next: Full list: 50 Most Powerful Women at //money.cnn.com/popups/2006/fortune/mostpowerfulwomen/1.html

Plus: Most Powerful Women: 10 Highest-Paid at //money.cnn.com/popups/2006/fortune/womenpay/index.html