Computer printers use three methods for creating words and images on paper.
Dot matrix printers press tiny pins against an inked ribbon to create dots on paper. Some dot matrix printers use nine pins, while others use 24 pins to create smaller and finer dots. Dot matrix printers are least expensive to purchase, but they are also noisier and slower than other printers. The second type of printer is an ink jet. It sprays tiny dots of ink on to paper.