Macintosh computer fanatics won't have Bill Gates to kick around anymore.
The Microsoft co-founder whose boyish face and nerdy manner epitomizes the US software colossus spends his last day at the office on Friday.
Paul Allen, who teamed with Gates to start Microsoft in a garage in 1975, will be among those "roasting" his childhood friend at a gala dinner affair Friday night.
After decades devoted to Microsoft, Gates turns his attention full time to the philanthropic Bill and Melinda Gates Foundation he established with his wife.
Gates leaves Microsoft to wrestle with a fast-changing computer era and growing challenges from Internet juggernaut Google and longtime rival Apple, which makes Macintosh computers.
Three people will essentially fill the void Gates leaves behind at Microsoft.
Gate's job as chief software architect is being handled by Ray Ozzie.