Operating System for Desktop and Laptop

          Let us discuss some most commonly used operating systems.

1.     MS-DOS (Microsoft Disk Operating System):-

                MS-DOS is one of the oldest and widely used operating system. DOS is a set of computer programs, the major functions of which are file management, allocation of system resources, providing essential features to control hardware devices.

              DOS commands can be typed in either upper case or lower case. It has three essential files and many command files. These essential files are IO.SYS (Input Output system), MSDOS.SYS (Microsoft Disk Operating System) and COMMAND.COM. these files are called system files of MS-DOS