Five things we have learned from Bill Gates Whether or not you're a fan of Bill Gates, it's impossible to deny the role he has played in spreading computer technology across the planet during the past three decades. His retirement as a full-time Microsoft employee in June 2008 marked the end of an era -- and it's one worth looking back on. This Sanity Savers for I-T executives discusses the five of the most important lessons we've learned from the meteoric and often turbulent career of the world's most famous IT professional.