Microsoft was founded in 1975 by Bill Gates and Paul Allen. It has gone through several phases of growth and transition, starting with the development of MS-DOS and Windows operating systems. It became very successful in the 1990s as Windows and Office grew to dominate personal computing. Recently, Microsoft has expanded into new areas like smartphones, search engines, and cloud services in an effort to diversify beyond PC software. While some of these efforts have seen mixed results, expanding into mobile and cloud aligns with changes in technology and should allow for continued growth if Microsoft executes well.