Used to print multipart forms and address labels ... Also known as a "serial dot matrix printer." The dot matrix printer uses one or two columns of dot hammers that are moved across the paper.

you only need one pin to print from a Commodore or any computer, for that matter. Like just about everything else that makes noise, someone will try to make music with dot matrix printers ...

Although inkjet and laser printers print in dots, and monitors display dots as well, the term generally refers to images created with serial dot matrix printers. See dot matrix printer.