Windows celebrates its fortieth anniversary on Thursday. On November 20, 1985, Microsoft released the very first version of the operating system. Over the past forty years, this software has changed enormously and has become one of the best-known systems in the world. But where did it all actually start? And what did that very first version of Windows look like?Microsoft Corporation is a leading American technology company, founded by Bill Gates and Paul Allen, known worldwide for its software products and services. Windows is Microsoft’s most successful and widespread operating system, powering billions of computers around the world. In addition to Windows, Microsoft is also a major player in cloud computing with Azure and in hardware with its Surface devices, and it owns the popular Xbox gaming console.

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