In 1973, 1, legend entered Harvard University. Legend scored 1590 (Full Score 1600) in the SAT standardized test. His academic performance was not good. Although the legend has a good memory, he has many "stinking problems": he often skips class, doesn't like taking a bath, only eats pizza and drinks soda when programming or playing cards. He became close friends with his roommate, Steve Ballmer. At Harvard, legend developed a version of basic programming language for the first microcomputer, MITs Altair. In January 1975, an article about its Altair 8800 computer was published in the American Popular Electronics magazine. Allen shows the legend the machine image. A few days later, the legend called ed Roberts, President of MITs, and said he and Allen had developed basic programs for the machine. In fact, they didn't write a single line of code. On February 1, 1975, after working day and night, legend and Allen wrote a program that could be run on Altair 8800. The price for sale to MITs was $3000, but the corresponding royalty was as high as $180000. On November 26, 1976, legend and Allen registered the Microsoft trademark. At one point, they considered calling the company Allen & Gates Inc., but later decided to change it to micro soft and remove the hyphen in the middle of the name. Allen was 23, and the legend was 21. In January 1977, the legend dropped out of Harvard University and went to Albuquerque, New Mexico. There, he found a job programming for Roberts at $10 an hour. MITs is headquartered in Albuquerque, where legend also has Microsoft. In 1977, when the legendary Secretary entered the Microsoft office building, he often found the legendary lying on the floor and sleeping. At this time, he still likes to eat pizza, at the same time, his opponents are very strict and often have fierce arguments with colleagues. "It's the stupidest idea I've ever heard," the legend used to say On January 1, 1979, legend moved Microsoft's headquarters to Bellevue, Washington. On August 28, 1980, legend signed a contract with IBM to develop an operating system for IBM's PC. Later, he purchased an operating system named qdos for 50000 US dollars, slightly improved it, renamed the product DOS, and authorized it to IBM.