Telidon Ink

When man and dinosaurs coexisted, computers (we used to call them electrocomputronoids) could communicate with humans using flattened tree mush and dot matrix impact printers. Usually, a print head traveled back and forth on a rail, banging out letters on tractor-feed paper thru an ink soaked ribbon. Unlike modern printers which employ magic and unicorn farts, the dot matrix print head was a simple column of pins with tiny electromagnets. Simple, indestructible and still used today.