Tandy 1200 HD User Manual page 167

APPENDIX E
Global Characters
(continued)
3. If you entered the DOS command
COPY 8"s." c :
Files (e) and (f) would be copied.
Now you know what you were doing in Chapter 1 when you made
backup copies of your DOS diskette. You entered the following DOS
command:
COPY/V
*.*
c :
This caused every file on the DOS diskette to be copied. Every base
name and every extension was covered (globally defined) by this
single command.
Global characters can be time savers, but consider what could happen
if you used them with the ERASE command. If you were not careful,
you could accidentally erase files you never intended to. DOS is
forgiving, and it will prompt you to make sure you really wish to go
ahead with global commands such as erase
*.*.
If you are not sure,
you have a chance to bail out. Nonetheless, you should be cautious
when using global characters, Detailed information on the use of
global characters can be found in your Disk Operating System manual.
E - 3