Microsoft was founded in 1975 by Bill Gates and Paul Allen with a mission of putting "a computer on every desk and in every home, running Microsoft software." It developed the DOS operating system for IBM computers and launched successful versions of Windows. Though it faced antitrust issues and challenges from competitors like Apple, Microsoft continued innovating with products such as Xbox and search engine Bing. Its CEO Satya Nadella emphasized the importance of having a clear sense of purpose and enduring mission beyond changes in technology.