Microsoft is into Software Packages, Windows Operating System Provider and Technology Solutions providing industry. Microsoft is providing Cloud Computing Technologies Solutions as well. Bill Gates is founder of Microsoft.
Windows Operating System, Microsoft Office, Office 365, xBOX, Microsoft Laptops, Mobiles are products from Microsoft. ASP.NET related tools, Microsoft CRM Packages and like these in couple of softwares also from Microsoft.
In Big Corporate Software Companies, there will be separate wing for people working on Microsoft Technnologies which shows its wide presence in technologies.