Microsoft was officially incorporated on June 25, 1981

[Windows Central]

Microsoft officially incorporated as a legal business entity almost exactly 36 years ago today, on June 25, 1981.
At Windows Central, we pride ourselves on not just our knowledge of Windows and its related ecosystem but also the ins and outs Microsoft's history. As such, we like to keep track of notable dates in the company's storied past.

Full story from the WindowsCentral blog...