He has been flipping bits with microscopic tools since 1973 and joined Microsoft in 1994. He has worked on many different areas of system and application software since he is easily distracted. The first computer he worked on controlled warehouses full of refrigeration. Now he works on computers which are refrigerated warehouses. The amount of accessible memory between then and now has increased by about 1013. This is roughly the difference between bacteria and humans. Interesting times.