FORTUNE's annual ranking of America's leading businesswomen

And the winners are...
This year's Most Powerful Women are shaping the future of technology, defense, and media -- and overseeing more than $1 trillion in revenue. More

Most Powerful Women Summit
Ginni Rometty, Carol Bartz, Lena Dunham -- these are just a few of the women who gathered for our Most Powerful Women Summit in October. Click for full coverage of the event, including videos, stories, photos and transcripts. More

10 Most Powerful Women Entrepreneurs
From movie stars to designers to scientists, this year's class of Most Powerful Women Entrepreneurs is a truly eclectic set. More

Ladies who launch: Dorm room startups
These women entrepreneurs managed to balance starting a new company and schoolwork. More

Equal wages, better economy
In which countries do men and women earn a similar amount -- and what does that mean for those economies? Fortune investigates. More

The Most Powerful Women in the global economy
More women wield more power than at any other point in history. Here is Fortune's list of 10 women guiding the future of the global economy.  More

What does power really mean
Fortune's Pattie Sellers looks back on 15 Most Powerful Women lists and the shifting definition of power  More

Interactive: Investing in the Most Powerful Women
Win some, lose some — see how stock prices have fared when companies had a female CEO take the helm. More

IBM's Ginni Rometty looks ahead
She's earned the No. 1 spot in our annual ranking of the Most Powerful Women in Business. But to keep Big Blue growing, Rometty will have to sell IBM like never before. More

Meet the queen bees
In celebration of our 15th Fortune Most Powerful Women issue, we're taking a trip down memory lane. Read the debut list entries of women who have been MPW the longest. More

Global power brokers
These additions to the International Power 50 are women on the rise. More

The many lives of Susan Lyne
Think the defense industry is a male-dominated field? Think again. This year, women in the defense sector's senior ranks saw a slew of promotions. More

HP and IBM: Two paths, one future
Despite bedrock similarities, the two giants have very different philosophies. More

Star athletes
Some of this year's most powerful women in business were power players in sports as well. Here are five female chief execs who have dominated on and off the court. More

The All-New ICICI
Chanda Kochhar has changed the DNA of ICICI from an aggressive sales and topline-oriented institution to a customer-centric bank. Now that the balance sheet is looking healthier, what's in the bag for the next few years? More

How we pick the Power 50
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the woman's business in the global economy, the health and direction of the business, the arc of the woman's career (resume and runway ahead), and societal and cultural influence.