Put away your secret decoder rings and pick up a copy of the latest edition of DOS For Dummies Quick Reference, 3rd Edition, the only book you'll ever need to take the mystery out of those strange, enigmatic commands in DOS-speak. Even if you've upgraded to the snazzy new Windows operating system, you may have times when those old DOS commands (which have been around since the first IBM computers appeared) may come in handy. What's a person to do?...