Before he could legally drink, he had co-founded one of the most powerful companies in the world.

On October 28, 1955, William Henry Gates III was born in Seattle, Washington. He started programming as a teenager, left Harvard, and in 1975 co-founded Microsoft with his childhood friend Paul Allen.

Microsoft's MS-DOS and later Windows became the software running on most personal computers, helping turn the computer from a lab machine into an everyday tool.

Gates later turned much of his attention to philanthropy through the Gates Foundation.

What was the first computer you ever used?

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