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GRAFTABL => (External) GRAFTABL [(code page)] GRAFTABL [status] Loads a table of character data into memory (for use with a color/graphics adapter). 
GRAPHICS => (External) GRAPHICS [printer type][profile] [/B][/R][/LCD][/PB:(id)] [/C][/F][/P(port)]Provides a way to print contents of a graphics screen display. 
HELP => (External) HELP [command] [/B][/G][/H][/NOHI] Displays information about a DOS command.
IF => (Internal) IF [NOT] EXIST filename (command) [parameters] IF [NOT] (string1)==(string2) (command) [parameters] IF [NOT] ERRORLEVEL (number) (command) [parameters]Allows for conditional operations in batch processing.
INCLUDE => (Internal) INCLUDE= blockname Used in the CONFIG.SYS file to allow you to use the commands from one CONFIG.SYS block within another.
INSTALL => (Internal) INSTALL=[d: ][\path]filename [parameters] Used in the CONFIG.SYS file to load memory-resident programs into conventional memory.
INTERLINK => (External) INTERLINK [client[:]=[server][:]] Connects two computers via parallel or serial ports so that the computers can share disks and printer ports. 
INTERSVR => (External) INTERSVR [d:][...][/X=d:][...] [/LPT:[n|address]] [/COM:[n|address]][/baud:rate] [/B][/V] INTERSVR /RCOPY Starts the Interlink server. 
JOIN => (External) JOIN d: [d:path] JOIN d: [/D] Allows access to the directory structure and files of a drive through a directory on a different drive. 
KEYB => (External) KEYB [xx][,][yyy][,][d:][path]filename [/E][/ID:(number)]  Loads a program that replaces the support program for U. S. keyboards. 
LABEL => (External) LABEL [d:][volume label] Creates or changes or deletes a volume label for a disk. 
LASTDRIVE => (Internal) LASTDRIVE=(drive letter) Used in the CONFIG.SYS file to set the maximum number of drives that can be accessed. 
LOADFIX => (Internal) LOADFIX [d:][path]filename [parameters] Ensures that a program is loaded above the first 64K of conventional memory, and runs the program. 
LOADHIGH => (Internal) LOADHIGH (LH) [d:][path]filename [parameters] Loads memory resident application into reserved area of memory (between 640K-1M).
MEM => (External) MEM [/program|/debug|/classify|/free|/module(name)] [/page] Displays amount of installed and available memory, including extended, expanded, and upper memory.
MEMMAKER => (External) MEMMAKER [/B][/batch][/session][/swap:d] [/T][/undo][/W:size1,size2] Starts the MemMaker program, a program that lets you optimize your computer's memory. 
MENUCOLOR => (Internal) MENUCOLOR=textcolor,[background] Used in the CONFIG.SYS file to set the colors that will be used by DOS to display text on the screen.
MENUDEFAULT => (Internal) MENUDEFAULT=blockname, [timeout] Used in the CONFIG.SYS file to set the startup configuration that will be used by DOS if no key is pressed within the specified timeout period.
MENUITEM => (Internal)MENUITEM=blockname, [menutext] Used in the CONFIG.SYS file to create a start-up menu from which you can select a group of CONFIG.SYS commands to be processed upon reboot.
MIRROR => (External) MIRROR [d:]path [d:] path [...] IRROR [d1:][d2:][...] [/T(drive)(files)] [/partn][/U][/1] Saves disk storage information that can be used to recover accidentally erased files. 
MKDIR => (MD) (Internal) MKDIR (MD) [d:]path Creates a new subdirectory.
MODE => (External) Sets mode of operation for devices or communications.
MORE => (External) MORE < (filename or command) (name)MORE Sends output to console, one screen at a time. 
MOVE => (Internal) MOVE [/Y|/-Y] [d:][path]filename[,[d:][path]filename[...]] destination Moves one or more files to the location you specify. Can also be used to rename directories. 
MSAV => (External) MSAV [d:] [/S|/C][/R][/A][/L][/N][/P][/F][/video][/mouse] SAV /video Scans your computer for known viruses. 
MSBACKUP => External) MSBACKUP [setupfile] [/BW|/LCD|/MDA] Used to backup or restore one or more files from one disk to another. 
MSCDEX => (External) MSCDEX /D:driver [/D:driver2. . .] [/E][/K][/S][/V][/L:letter] [/M:number] Used to gain access to CD-ROM drives (new with DOS Version 6).
MSD => (External) MSD [/B][/I] BSD [/I] [/F[d:][path]filename [/P[d:][path]filename [/S[d:][path]filename Provides detailed technical information about your computer. 
NLSFUNC => (External) NLSFUNC [d:][path]filename Used to load a file with country-specific information.
NUMLOCK => (Internal) NUMLOCK=on|off Used in the CONFIG.SYS file to specify the state of the NumLock key.
PATH => (Internal) PATH; PATH [d:]path[;][d:]path[...]  Sets or displays directories that will be searched for programs not in the current directory.
PAUSE => (Internal) PAUSE [comment]  Suspends execution of a batch file until a key is pressed.
POWER => (External) POWER [adv:max|reg|min]|std|off] Used to turn power management on and off, report the status of power management, and set levels of power conservation. 
PRINT => (External) PRINT [/B:(buffersize)] [/D:(device)] [/M:(maxtick)] [/Q:(value] [/S:(timeslice)][/U:(busytick)] [/C][/P][/T] [d:][path][filename] [...] Queues and prints data files.
PROMPT => (Internal) PROMPT [prompt text] [options]  Changes the DOS command prompt. 
RECOVER => (External) RECOVER [d:][path]filename RECOVER d: Resolves sector problems on a file or a disk. (Beginning with DOS Version 6, RECOVER is no longer available ).
REM => (Internal) REM [comment] Used in batch files and in the CONFIG.SYS file to insert remarks (that will not be acted on).
RENAME => (REN) (Internal) RENAME (REN) [d:][path]filename [d:][path]filename  Changes the filename under which a file is stored.
REPLACE => (External) REPLACE [d:][path]filename [d:][path] [/A][/P][/R][/S][/U][/W] Replaces stored files with files of the same name from a different storage location.
RESTORE=> (External) RESTORE d: [d:][path]filename [/P][/S][/B:mm-dd-yy] [/A:mm-dd-yy][/E:hh:mm:ss] [/L:hh:mm:ss] [/M][/N][/D] Restores to standard disk storage format files previously stored using the BACKUP command.
RMDIR => (RD) (Internal) RMDIR (RD) [d:]path Removes a subdirectory.
SCANDISK => (External) Starts the Microsoft ScanDisk program which is a disk analysis and repair tool used to check a drive for errors and correct any problems that it finds. 
SELECT => (External) SELECT [d:] [d:][path] [country code][keyboard code] Formats a disk and installs country-specific information and keyboard codes (starting with DOS Version 6, this command is no longer available).
SET => (Internal) SET (string1)=(string2) Inserts strings into the command environment. The set values can be used later by programs.
SETVER => (External) SETVER [d:]:path][filename (number)][/delete][/quiet]  Displays the version table and sets the version of DOS that is reported to programs.
SHARE => (External) SHARE [/F:space] [/L:locks] Installs support for file sharing and file locking.
SHELL => (Internal) SHELL=[d:][path]filename [parameters] Used in the CONFIG.SYS file to specify the command interpreter that DOS should use.
SHIFT => (Internal) SHIFT Increases number of replaceable parameters to more than the standard ten for use in batch files.
SORT => (External) SORT [/R][/+n] < (filename) SORT [/R][/+n] > (filename2) Sorts input and sends it to the screen or to a file.
STACKS => (Internal) STACKS=(number),(size) Used in the CONFIG.SYS file to set the number of stack frames and the size of each stack frame.
SUBMENU => (Internal) SUBMENU=blockname, [menutext] Used in the CONFIG.SYS file to create a multilevel menu from which you can select start-up options.
SUBST => (External) SUBST d: d:path SUBST d: /D Substitutes a virtual drive letter for a path designation.
SWITCHES => (Internal) SWITCHES= [/K][/F][/N][/W] Used in the CONFIG.SYS file to configure DOS in a special way; for example, to tell DOS to emulate different hardware configurations.
SYS => (External) SYS [source] d: Transfers the operating system files to another disk.
TIME => (Internal) TIME hh:mm[:ss][.cc][A|P] Displays current time setting of system clock and provides a way for you to reset the time. 
TREE => (External) TREE [d:][path] [/A][/F] Displays directory paths and (optionally) files in each subdirectory. 
TYPE => (Internal) TYPE [d:][path]filename Displays the contents of a file.
UNDELETE => (External) UNDELETE [d:][path][filename] [/DT|/DS|/DOS] Restores files deleted with the DELETE command.
UNFORMAT => (External) UNFORMAT d: [/J][/L][/test][/partn][/P][/U]  Used to undo the effects of formatting a disk.
VER => (Internal) VER Displays the DOS version number.
VERIFY => (Internal) VERIFY on|off Turns on the verify mode; the program checks all copying operations to assure that files are copied correctly.
VOL => (Internal) VOL [d:] Displays a disk's volume label.
VSAFE => (External) VSAFE is a memory-resident program that continuously monitors your computer for viruses and displays a warning when it finds one.
XCOPY => (External) XCOPY [d:][path]filename [d:][path][filename] [/A][/D:(date)] [/E][/M][/P][/S][/V][/W][Y\-Y]Copies directories, subdirectories, and files.