Behind every great machine, there’s a great man or — in some cases —  woman. The first woman Chairman, President and CEO of IBM, Rometty has turned the core focus of the company to cognitive computing, leading the charge to get Watson ready for commercial use. Fortune has named her among the “50 Most Powerful Women in Business” for ten consecutive years.

“If I had to pick one word that IBM’s reinventing around, it’s ‘data,” she said in a recent interview.

Speaking of data, IBM compiled this list of AI experts to follow on Twitter. We wonder if Watson helped compile the list!