Notice that the MD command has no output to the screen. But there was no error message either. That means that whatever you asked DOS to do; it did it...very quietly. Let’s look and see if the new directory really exists.
C:\>dir
Volume in drive C is DOS
Volume Serial Number is 2221-0476
Directory of C:\
DOS <DIR> 01-01-97 12:35a
COMMAND COM 54,645 05-31-94 6:22a
WINA20 386 9,349 05-31-94 6:22a
CONFIG SYS 71 01-01-97 12:41a
AUTOEXEC BAT 78 01-01-97 12:41a
TEMP <DIR> 03-06-03 3:16p
6 file(s) 64,143 bytes
2,138,046,464 bytes free
C:\>_