What's with you people.
Just because it's old doesn't mean it's no good.
DOS or "MSdos" as in "Microsoft Disk Operating System",
is a command line OS(operating system), where you have
to manually type in key letters or words
to activate particular functions.
It is known for giving you a...
"this is not recognized as an internal or external command,
operable program or batch file" responce when you mis-type something.
Dos, as an OS, does NOT exist anymore.
However, every more common OS has an underlying command line base.
You can start it by using the "RUN" option in your start menu,
and then typing "CMD" or "command".
DOS commands are very useful for creating batch files
to do stuff for you. Like turn something on or open a folder
when you log onto your computer. That way you don't have to
do it yourself.
FOR EXAMPLE...
If you create a ".bat" file with this line of text in it...
@echo off
explorer.exe /root,"C:\Documents and Settings\(your user name here)\My Documents\My Pictures"
When you click the file, it will open that folder for you.
You can also put in any directory path you want.
ALSO, you could put it in the...
C:\Documents and Settings\(your user name here)\Start Menu\Programs\Startup
folder, and it would autostart when you log onto your computer.
Type in...
@echo off
start cd C:\Documents and Settings\(your user name here)\My Documents\My Pictures
and it would open a command line window to that directory path.
OR YOU COULD TYPE...
start wmplayer.exe
Or the name of any program to start it.
SO dos is very useful.
Especially when you want to open something that has a very long directory path. Just create a ".bat" file that will do the job for you.
mrgreen 
