Global Filename Characters - IBM 5150 Manual To Operations

Global Filename Characters
BE CAREFUL WITH GLOBAL FILENAME
CHARACTERS.
We recommend that you DO NOT USE global filename
characters in the file specification of the ERASE
command until you are familiar with exactly what they
will
do.
For example, typing
erase
*.*
removes all the files from the diskettes (except the DOS
system files, if present).
If the files that are removed by using global characters
are not the ones that you expected, you can recover this
information only if you have previously made a back-up
diskette.
DOS 3-81