Bill Gates, the man who started Microsoft and has been its public face throughout its three decades of existence, plans to step away from daily work at the company. Gates announced on Thursday that he will gradually relinquish his current role, ceding the title of chief software architect immediately, while remaining a full-time employee for the next two years. In July 2008, he will become a part-time employee and chairman. The announcement comes as his company battles pressures on all fronts: a sagging stock price, competition from Google and nagging delays in the Vista operating system.