Microsoft, founded in 1975, is one of the world’s largest companies by market capitalization and created Windows.
Bill Gates and Paul Allen founded Microsoft in Albuquerque, New Mexico, after developing and licensing a version of the BASIC programming language for the Altair 8800. The company later became a dominant force in personal-computer software through MS-DOS and Windows.
Microsoft’s modern business is much broader than desktop operating systems. It includes Azure cloud computing, Microsoft 365 productivity software, enterprise applications, cybersecurity products, gaming through Xbox, search and advertising, and professional networking through LinkedIn.
Its market value has been supported by recurring software revenue and the growth of cloud computing and AI services. Microsoft’s position in market-cap rankings can change as its share price moves, but its long history and diversified technology portfolio keep it a frequent member of the global top tier.