https://www.cnet.com/news/microsoft-teases-new-windows-10-s-mode-in-2019/

Microsoft is ending Windows 10 S as its own distinct operating system. 

Windows 10 S, a stripped-down operation system targeting schools and students, launched last year as an alternative operating system to full-blown Windows 10. The simplified OS took a page from Google's Chrome OS, which school administrators have flocked to for its simplicity. Window 10 S users, for example, could only install apps from the Windows Store.