An anonymous reader writes "Way back in 1974, Dave Dennis, then aged 13, decided to try out the -ext- TUTOR command on the PLATO system at the University of Illinois, and see if he could cause all the terminals of other users to go offline. It worked. And he never got caught. Of course, the powers that be eventually caught on and fixed the -ext- command so terminals by default didn't automatically receive -ext-'s sent from other locations."
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 Internet speed test! ×