Internal commands

@
:
ATTRIB
BREAK
CD / CHDIR
CHKDSK
CLEAR
COMMAND
CLS
DEBUG
DEL
DELTREE
DIR
DOSKEY
EDIT
ECHO
EJECT
EXIT
FDISK
FIND
FOR
FORMAT
GOTO
HELP
IF
JOIN
LABEL
LOCK
MD / MKDIR
MEM
MODE
MORE
MOVE
PATH
PAUSE
PRINT
PROMPT
PUSHD
POPD
RD / RMDIR
REM
REN / RENAME
REPLACE
RMVIEW
SET
SHIFT
SORT
SYS
TIME
TREE
TYPE
UNLOCK
VER
VOL
XCOPY

https://de.wikipedia.org/wiki/Liste_von_DOS-Kommandozeilenbefehlen