Disk Operating System (NCO)

This command displays a list of files and subfolders. This command is useful if we want to know what directories have been created on a specified disk. The directories will be displayed along with the files on the disk.

It is a command used in MS-DOS, PC-DOS and Microsoft Windows for copying the complete contents of a diskette to another diskette.

It is a symbol used to represent the readiness of a system to perform the next command. A prompt may also be a text representation of where the user is currently.

This command is used to provide ongoing protection against viruses invading one's computer.

This command is used to display the DOS version and is used to set the version number that the MS-DOS subsystem reports to a DOS program.

It is used to copy one or more files from one location to another. It can also be used to create new files. By copying from the keyboard to the screen, files can be created and then saved to disk.

It is an internal command that is used on DOS and Microsoft Windows-based systems to check the file system and status of the system hard drives and correct the errors.

In this, we start the computer when its power is turned off. To perform a cold boot while the computer is still running, Shut Down must be selected from the menu first. Once the computer is turned off, turning it back on performs the cold boot.

It is a real-time compression capability built into DOS 6 that increases the storage capacity of a disk generally by a factor of two. The actual compression obtainable depends on the data being stored.

This command is an MS-DOS command that is not included in command.com, but is available through separate executable files.

The CD command, also known as CHDIR, is a command line OS shell command used to change the current working directory in operating systems such as Unix, DOS, Windows etc.

It is an external command that will divide the surface of a blank floppy disk into sectors and assign a unique address to each one.

It is a command that allows us to clear the contents of the screen and leave only a prompt. It is an internal command and is available in the upper left corner of the screen.

It is used to erase information off a computer diskette. It divides the surface of a blank floppy disk into sectors and assigns a unique address to each one.

The DELTREE command allows us to delete a directory even if it contains files and subdirectories and all its contents in one step. This command specifies the name of the directory you want to delete.