ATTRIB    displays or changes file attributes
CHDIR or CD    displays the name of the current directory or changes the current directory
CHKDSK    checks the status of a disk and displays a status report; it can also fix disk errors 
CLS    clears the screen
COPY    copies one or more files to a destination you specify
DEL    deletes the files you specify
DELTREIE    deletes a directory and all the files and subdirectories that are in it
DIR    displays the files and subdirectories that are in the directory you specify
DISKCOPY    copies the entire contents of one floppy disk to another floppy disk. It writes over the existing contents of the destination disk as it copies the new information on it.
ECHO    displays or hides the text in batch programs when the program is running.
EDIT    starts MS-DOS Editor, a text editor you can use to create and edit ASCII text files.
DEL or ERASE    deletes the files you specify
EXIT    quits the MS-DOS command interpreter and returns to the program that started it, if one exists.
FASTHELP    displays a list of all MS-DOS 6 commands and gives a short explanation of each.
FIND    searches for a specific string of text in a file or files
FORMAT    formats a disk for use with MS-DOS
HELP    starts MS-DOS Help
MKDIR or MD    creates a directory 
MEM    displays the amount of used and free memory on your computer
MORE    displays one screen of output at a time 
MOVE    moves one or more files to the location you specify
MSBACKUP    backs up or restores one or more files from one disk onto another
MSD    Provides technical information about your computer
PRINT    prints a text file while you are using other MS-DOS commands
QBASIC    starts MS-DOS Qbasic
RD or RMDIR    deletes a directory
REN    changes the name of the file or files you specify
RMDIR or RD    deletes a directory
SCANDISK    starts a disk analysis and repair tool that checks a drive for errors and corrects any problems that it finds.
TREIE    graphicaly displays the structure of a directory
UNDELETE    restores files that were deleted previously by using the DEL command
VER    displays the MS-DOS version number
XCOPY    copies directories , their subdirectories, and files except hidden and system files.