Most people know Bill Gates(比尔`盖茨). He is 1 in the world. He was born on October 28th, 1955. He 2 in Seattle, Washington. His favorite subjects at school were science and math. When he was 13 years old, Bill started to play with 3Computers at that time was very 4, but he was 5 in it. He 6 lots of time doing unusual things with computers. In the end, he and some of his friends worked out(解决)a software program(软件程序) with an old computer. He 7 it for $4, 200 dollars. In 1973, Bill8 Harvard University(哈佛大学), He left there in the third year to work for a company(公司)called Microsoft. In 1975 Bill began 9 company with his friend Paul Allen. They developed software for personal computers. They improved the software to make it 10 for people to use computers.