A
dot matrix printer or impact matrix printer refers to
a type of computer printer with a print head that runs
back and forth on the page and prints by impact, striking
an ink-soaked cloth ribbon against the paper, much like
a typewriter. Unlike a typewriter or daisy wheel printer,
letters are drawn out of a dot matrix, and thus, varied
fonts and arbitrary graphics can be produced. Because
the printing involves mechanical pressure, these printers
can create carbon copies and carbonless copies.