Today's printers might actually work -- well, most of the time but boy don't we miss bone-crunching sound of the dot matrix is one of the most immediately recognizable noises in yesterday's technology. What other sound, after all, so deafeningly conveys the message: "Hey, buddy: Get ready to fix a paper jam"? I wonder whatever happened to all of these things?  I bet in Africa somewhere they are still hearing this sound!