There are some hidden dos commands which u can't recognise by typing help in cmd

CTTY
Change the computers input/output devices.

DATE
View or change the systems date.

DEBUG
Debug utility to create assembly programs to modify hardware settings.

DEFRAG
Re-arrange the hard disk drive to help with loading programs.

DELTREE
Deletes one or more files and/or directories.

DISABLE
Recovery console command that disables Windows system services or drivers.

DISKCOMP
Compare a disk with another disk.

DISKCOPY
Copy the contents of one disk and place them on another disk.

DOSKEY
Command to view and execute commands that have been run in the past.

DOSSHELL
A GUI to help with early MS-DOS users.

DRIVPARM
Enables overwrite of original device drivers.

ECHO
Displays messages and enables and disables echo.

EDIT
View and edit files.

EDLIN
View and edit files.

EMM386
Load extended Memory Manager.

ENABLE
Recovery console command to enable a disable service or driver.

ENDLOCAL
Stops the localization of the environment changes enabled by the setlocal command.

ERASE
Erase files from computer.


EXPAND
Expand a Microsoft Windows file back to it's original format.

EXTRACT
Extract files from the Microsoft Windows cabinets.

FASTHELP
Displays a listing of MS-DOS commands and information about them.

FC
Compare files.

FDISK
Utility used to create partitions on the hard disk drive.

FIND
Search for text within a file.

FINDSTR
Searches for a string of text within a file.

FIXBOOT
Writes a new boot sector.

FIXMBR
Writes a new boot record to a disk drive.

FOR
Boolean used in batch files.

FORMAT
Command to erase and prepare a disk drive.

FTP
Command to connect and operate on a FTP server.

FTYPE
Displays or modifies file types used in file extension associations.
GOTO
Moves a batch file to a specific label or location.