International Business Machines Corporation (IBM) is a company from the United States that makes and sells software, computer hardware, infrastructure services, and consulting services. IBM is one of the biggest Information Technology companies in the world. IBM has had the most patents of any technology company for many years, and has made many important inventions and discoveries that have improved computers.
IBM began in 1911, it was called the "Computer Tabulating Recording Company". It was set up by a man named Charles Flint. There were no computers at that time, so IBM made other machines, such as typewriters. In 1924, the company changed its name to International Business Machines (IBM). In 1937, the company's Tabulating Machines were used by the United States government to record information about Americans, so they could make a new law called the Social Security Act.
During World War II, IBM made guns for the American army. During the 1960s, IBM computers were used for American space exploration. From the 1980s until 2005, IBM made personal computers. In 2005, IBM sold their personal computer manufacturing to a Chinese company called Lenovo. Today, IBM mostly makes software, and some powerful supercomputers.