Windows 10

Windows 10 is a computer operating system by Microsoft. It is part of the Microsoft Windows family of operating systems. It was called Threshold when it was being developed (made/coded). Windows 10 was announced at a press event on 30 September 2014. It came out for personal computers on 29 July 2015. 
Windows 10 is designed to provide a common appearance (looks) for different systems. These include desktop, laptop, and other systems. 
Unlike earlier versions of Windows, Windows 10 was regularly updated with new features based on user feedback, starting before it was first released. Every half a year, Microsoft releases updates with new features. Each release has a four-digit build number. The first two digits (2 numbers) refer to the year of release, and the other two digits refer to the month of release (e.g. "1903" refers to a build released in March 2019).
Versions.
Windows 10 has many versions for different uses, that have different features.