The OS what I know includes Microsoft WindowsUnixAndroidLinux and Mac. I usually use Windows OS and Android.The Microsoft Windows series operating system is a graphical operating system designed on the basis of MS-DOS designed by Microsoft for IBM machines. Today's Windows systems such as Windows 2000 and Windows XP are based on the modern Windows NT kernel. The NT kernel is borrowed from systems such as OS/2 and OpenVMS. Windows can run on 32 bit and 64 bit Intel and AMD processors but ear