The dot matrix printer uses one or two columns of dot hammers ... The more hammers, the higher the resolution. For example, 9-pin heads produce draft quality text, while 24-pin heads produce ...

There was much whooping and hollering, as there often is when a dot matrix printer screams into life in a suburban household. We were getting closer, but we needed just a little more. Spraying ...

Dot matrix printers are the dinosaurs that won’t go ... and after finding a crack in the flexible ribbon to the head he discovered that some of the solenoids were open-circuit.