BYE, BILL

In a corner office on Microsoft's leafy, low-rise campus in suburban Seattle, a bespectacled, slightly portly middle-aged man has been packing up his belongings. Bill Gates logs off today after 33 years in day-to-day control of the world's biggest software company.

Gates, 52, is retiring in order to spend more time giving away his $58bn (£29bn) fortune.

More at guardian.co.uk.