Gates says farewell to Microsoft Corp.

REDMOND, Wash. -- On his final full day at Microsoft Corp., Bill Gates went on stage to reminisce with his longtime friend Steve Ballmer, and neither man could hold back tears as Ballmer handed Gates a large scrapbook as a farewell present.

Gates, who is stepping back to focus on his philanthropy, sat with CEO Ballmer in a Microsoft conference room and meandered through moments in Microsoft's history. They stopped to get in a few good digs at IBM Corp., whose first personal computers were loaded with Microsoft's DOS operating system before IBM adopted its own operating software and their relations strained.

Gates founded Microsoft with Paul Allen in 1975. He will remain Microsoft's chairman on a part-time basis, said he would still take on Microsoft projects picked by Ballmer and two other executives who have assumed most of his day-to-day tasks, Craig Mundie and Ray Ozzie.