Internal & External Commands

 

INTERNAL COMMANDS

  1. These are those commands which are contained in command.com files of MS-DOS.
  2. These are those functions that are built into the command interpreter.
  3. There is no need of any external file in computer to read internal MS-DOS command.
  4. These commands can be used as long as DOS is running on the system.
  5. Internal commands do not vary from system to system.
  6. These are ver, time, del, md, cd, copy con, cls, date, vol, ren, copy etc.

 

BREAK

CALL

CHCP

CHDIR(CD)

CLS

COPY

CTTY

DATE

DEL(ERASE)

DIR

ECHO

EXIT

FOR

GOTO

IF

MKDIR(MD)

PATH

PAUSE

PROMPT

REM

RENAME(REN)

RMDIR(RD)

SET

SHIFT

TIME

TYPE

VER

VERIFY

VOL

External Commands

  1. These are those commands which are not in-built in MS-DOS.
  2. External commands are those which are not included in the interpreter.
  3. There is a need of an internal file in the computer to read external MS-DOS command.
  4. External command may vary from system to system. This means any two computers with same version of MS-DOS may have same internal commands, but may have different external commands.
  5. These are tree, xcopy, diskcopy, more, print etc.

 

APPEND.EXE

ASSIGN.COM

ATTRIB.EXE

BACKUP.EXE

CHKDSK.EXE

COMMAND.COM

COMP.EXE

DEBUG.EXE

DISKCOMP.COM

DISKCOPY.COM

DOSKEY.COM

DOSSHELL.COM

EDIT.COM

EDLIN.EXE

EMM386.EXE

EXE2BIN.EXE

EXPAND.EXE

FASTOPEN.EXE

FC.EXE

FDISK.EXE

FORMAT.COM

GRAFTABLE.COM

GRAPHICS.COM

HELP.EXE

JOIN.EXE

KEYB.COM

LABEL.EXE

MEM.EXE

MIRROR.COM

MODE.COM

MORE.COM

NLSFUNC.EXE

PRINT.EXE

QBASIC.EXE

RECOVER.EXE

REPLACE.EXE

RESTORE.EXE

SETVER.EXE

SHARE.EXE

SORT.EXE

SUBST.EXE

SYS.COM

TREE.COM

UNDELETE.EXE

UNFORMAT.COM

XCOPY.EXE

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