What is Dot Matrix printer

IBM made the first dot matrix printer in 1957. However, the first dot matrix impact printer was introduced in 1970 by Centronics. It prints letters as a combination of dots. Dot matrix printers are the most popular among serial printers. These consist of a matrix of pins on the print head of the printer that form the character.

The computer memory sends one character at a time to be printed by the printer. There is a carbon between the pin and the paper. When the pin hits the carbon, the words are printed on the paper.