Windows 6.x to 8.x

NOTES 2:

RT system was released for phones as Windows Phone 7.x. Updated RT system was released for phones and tablets as Windows Phone 8.x and Windows 8.x RT. With Windows 10, Microsoft integrated RT platform into the NT system so the OS can run both NT based programs--often called desktop apps--and RT based programs--often called Windows Store apps or mobile apps. Because RT based system settings screen has been added to the Windows OS, certain settings accessible through Control Panel are now accessible also through Settings--creating duplicate appearance of such items.