In 2002, Fiorina oversaw what was then the largest technology sector merger in history, in which HP acquired rival personal computer manufacturer, Compaq. The transaction made HP the world's largest seller of personal computers. HP subsequently laid off 30,000 U.S. employees. Nonetheless, the number of employees exceeded the pre-merger figure and grew to 150,000 during her tenure. In February 2005, she was forced to resign as CEO and chair following a boardroom disagreement. She subsequently served as Chair of the philanthropic organization Good360.