[Saajan]

REDMOND, Washington (Reuters) - Bill Gates said a teary goodbye on Friday to Microsoft Corp, the software maker he built into the world's most valuable technology company based on the ambitious goal of placing a computer on every desk and in every home.

He leaves Microsoft, which he co-founded with childhood friend Paul Allen in 1975, to focus on his philanthropic organization, the Bill & Melinda Gates Foundation, the world's largest charity, funded in part by his vast fortune.

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