APPEND [pathmame] [;pathname] External 3.2+ Sets search path for nonexecutable files. ASSIGN [drive=drive] External 2.0+ Reassigns disk drive to another disk drive name. (Caution see DOS manual) ATTRIB [+ or -R] [+ or -A] pathname External 3.0+ Change file attribute of read-only and archive files or display attribute status. BACKUP [pathname] drive: External 2.0+ Backup hard drive files to a floppy drive. Use RESTORE to restore files. (see DOS manual) BREAK [on] [off] Internal 2.0+ "CTRL+C" Turns break on or off or display break status. BUFFERS=# Internal 2.0+ Sets the number of disk buffers (528 bytes each). Used in the CONFIG.SYS file. 1-99 CALL Internal 3.3+ Calls another batch file from a batch file without terminating the calling batch file. CHCP [###] Internal 3.3+ Selects or displays the active code page defined by the COUNTRY command. CHDIR [pathname] or CD [pathname] Internal 2.0+ Change the current directory to pathname or display the current directory. CHKDSK [drive:] [/F] [/V] External 1.0+ Checks disk and reports disk information. /F correct errors if possable, /V display messages. CLS Internal 2.0+ Clears the display screen and sends the cursor to the top left corner of the screen (home position). COMMAND External 2.0+ Starts a new command processor. (see DOS manual) Optional switches depends on DOS version. COMP pathname pathname or FC pathname pathname External 1.0+ (depends on version) Compares two files byte-by-byte. COPY pathname [pathname][/A][/B][/V] Internal 1.0+ Copy file from one pathname to another. /A ASCII file, /B binary file, /V verify copy. COUNTRY=### External 3.0+ Select country or language code. Used in the CONFIG.SYS file. CTTY device Internal 2.0+ aux, com#, con, lpt#, prn Changes I/O to device. DATE [mm-dd-yy] Internal 1.0+ Change or display current date. (month-day-year) DEBUG [file] External 1.0+ Starts the DOS DEBUG program. Test executable files with debug commands. DEL pathname Internal 1.0+ Delete file named by pathname. Same as ERASE. DEVICE=pathname Internal 2.0+ Install device driver (see DOS manual). Used in the CONFIG.SYS file. DEVICEHIGH=pathname Internal 5.0+ Install device driver in upper memory. Used in the CONFIG.SYS file. (see DOS manual) DIR [pathname] [/P] [/W] Internal 1.0+ Display directory. /P page at a time, /W display directory wide. DISKCOMP [drive:] [drive:] [/1] [/8] External 1.0+ Compares two floppy diskettes. Switches depend on version. /1 one side, /8 eight sectors per track. DISKCOPY [drive:] [drive:] External 1.0+ Copies floppy diskette from one diskette to another. Switch depends on version. /1 copy one side. DOS=parameters Internal 5.0+ Specifies DOS in upper memory. Used in the CONFIG.SYS file. (see DOS manual) DOSKEY [options] External 5.0+ TRS command line program. (see DOS manual) DOSSHELL [options] External 4.0+ DOS shell program. (see DOS manual) DRIVPARM=switches Internal 4.0+ Defines parameters drives. Used in the CONFIG.SYS file. (see DOS manual) ECHO [on] [off] [message] Internal 2.0+ Controls screen output during batch file execution. EDIT [pathname] [switches] External 5.0+ Edit program. (see DOS manual) EDLIN [pathname] [switch] External 1.0+ Edit program. (see DOS manual) ERASE pathname Internal 1.0+ Erase file named by pathname. Same as DEL. EMM386 [parameters] External 5.0+ Expanded-memory support for a 80386 or higher. (see DOS manual) EXE2BIN pathname [pathname] External 1.0+ Convert an .exe file to a .com file. (for programers only) EXIT Internal 2.0+ Return control to invoking program. EXPAND [pathname] [pathname] External 5.0+ Expand DOS file from DOS disk. (see DOS manual) FASTOPEN drive:[=#] External 3.3+ Fast access to frequently used files. Used in the CONFIG.SYS file. (see DOS manual) FC pathname pathname or COMP pathname pathname External 1.0+ (depends on version) Compares two files byte-by-byte. FCBS #,# Internal 3.0+ Number of file control blocks that may be used. Used in the CONFIG.SYS file. (see DOS manual) FDISK External 2.0+ Configure a fixed disk. (Caution see DOS manual) FILES=# Internal 2.0+ Set aside more memory for file handles. (over 8) Used in the CONFIG.SYS file. FIND "string" [pathname] External 2.0+ Find string in file specified by pathname. See DOS manual for optional switches. FOR %[%]variable IN (set) DO command Internal 2.0+ Performs command for each item in set. (see DOS manual) FORMAT drive: External 1.0+ Prepares new disk for use. (Caution see DOS manual) See DOS manual for optional switches. GOTO label Internal 2.0+ Goto line with label in batch file. GRAFTABL External 3.0+ Fix for monitors that do not display extended characters (128-255). Use only if needed. GRAPHICS External 2.0+ Load to print graphic screen with shift-print. See DOS manual for optional switches. HELP [command] External 5.0+ Help program. IF [not] condition command Internal 2.0+ If condition is true then execute command. If (not) condition is false then execute command. INSTALL [pathname] Internal 4.0+ Install memory-resident program. Used in the CONFIG.SYS file. JOIN [drive:] [pathname] External 3.0+ Joins drive to pathname or display status. (Caution see DOS manual) KEYB [options] External 2.0+ Set language for keyboard. Keyboard program. (See DOS manual) LABEL [drive:] [label] External 3.0+ Change, create, or delete volume label. The disk label can have up to 11 characters. LASTDRIVE=A-Z Internal 3.0+ Sets the last drive that can be accessed. Used in the CONFIG.SYS file. LOADHIGH [pathname] Internal 5.0+ Load program in upper memory. (See DOS manual) MEM [switch] External 4.0+ Displays memory information. Switches are /program, /debug, /classify. MIRROR [drive][options] External 5.0+ Saves information for recovery by the undelete and unformat commands. (See dos manual) MKDIR pathname or MD pathname Internal 2.0+ Make a new directory named by pathname. Directory names can have up to 8 characters. MODE option External 1.0+ Sets optional modes. (See DOS manual for options) MORE External 2.0+ Used to display output one screen at a time. NLSFUNC [pathname] External 3.3+ Program that loads country language information. PATH [;] [pathname] [;pathname] Internal 2.0+ Display path or cancel path or set new path. PAUSE [message] Internal 1.0+ Pause execution of batch file with optional message. Displays > Strike a key when ready . . . PRINT pathname External 2.0+ Printout file named in pathname. See DOS manual for optional switches. PROMPT [$character(s)] Internal 2.0+ Change system prompt. See DOS manual for optional characters. RECOVER [pathname] or [drive:] External 2.0+ Recover file(s) with bad sectors. (Caution see DOS manual) REM [remark] Internal 1.0+ Lets you include a remark in a batch file. The remark is displayed if ECHO is on. RENAME pathname filename Internal 1.0+ Renames filename in pathname to filename. REPLACE pathname pathname External 3.2+ Selectively replace or add files. See DOS manual for optional switches. RESTORE drive: pathname External 2.0+ Restores files that were stored by BACKUP only. See DOS manual for optional switches. RMDIR pathname or RD pathname Internal 2.0+ Remove a directory named by pathname. Only an empty directory can be removed. SET [name=[string]] Internal 2.0+ Sets DOS variable name equal to string or display the current environment. SHARE External 3.0+ Installs support for file sharing and locking. See DOS manual for optional switches. SHIFT Internal 2.0+ Shift parameters back one place. SORT [pathname] External 2.0+ Sorts data to pathname or display. See DOS manual for optional switches. STACKS=n,s Internal 3.2+ Sets the number of stacks (n) and the size of each stack (s). Used in the CONFIG.SYS file. SUBST [drive:] [pathname] [/D] External 3.0+ Substitutes drive: for pathname or delete specifier. (Caution see DOS manual.) SYS drive: External 1.0+ Transfers two hidden system files to specified drive. TIME [hh:mm:ss] Internal 1.0+ Set or display time. TREE drive: [/F] Internal 2.0+ Displays directories and subdirectories. /F also display files. TYPE pathname Internal 1.0+ Displays file on screen. UNDELETE [pathname] [options] External 5.0+ Attempts to restore files that were deleted. See DOS manual for optional switches. UNFORMAT [drive] [options] External 5.0+ Attempts to recover a drive after it has been formated. See DOS manual for optional switches. VER Internal 2.0+ Displays DOS version number. VERIFY [on] [off] Internal 2.0+ Displays verify setting or turns verify on/off. To verify that files written can be read. VOL [drive:] Internal 2.0+ Displays volume label. XCOPY pathname [pathname] External 3.2+ Enhanced copy command. See DOS manual for optional switches.