One of the most important products developed by Microsoft is the Windows operating system. Windows is the most widely used operating system in the world, and has been the backbone of the personal computer market for decades. Windows has undergone many changes and updates over the years, but has remained popular due to its ease of use and compatibility with a wide range of hardware and software.

Another major product developed by Microsoft is the Microsoft Office suite of productivity software. This includes popular programs such as Word, Excel, PowerPoint, and Outlook. These programs are used by millions of people around the world for tasks such as word processing, spreadsheet analysis, and creating presentations. The Microsoft Office suite has also been adapted for mobile devices, making it more accessible for users on the go.

The company also produces a wide range of other consumer and business software for desktops, laptops, tablets, widgets and servers, including Internet search (via Bing),  digital services marketplace (via MSN), mixed reality (HoloLens), cloud computing(Azure) and software  (Visual Studio).