(Mostly HP JetDirects, but a little info on the Ricoh Savins), This article will attempt to point out some of the more interesting things that can be done with a network based printer to make it reveal information about its users, owners and the network i
"When the lady at the corner market runs the package over the scanner (or whatever it is they do in your area), the computerized cash register reads the UPC code as a string of binary digits."