Dot Matrix Printers
The use of dot matrix printers is not common as it once was, but you can still find these old units in many schools and businesses. Dot matrix printers use a special type of paper with holes at each side. These holes fit over the sides of the printer, and the printer pulls each sheet through as it prints. As the paper has perforations, operators can tear off the pages that they need. Dot matrix printers apply ink to the printout by way of pins in a moving print head striking against an ink-covered ribbon, similar to a typewriter.