Printer is a device that prints text or illustrations on paper. There are many different types of printers but the most widely used printers are:
Dot-matrix printer strikes pins against an ink ribbon. Each pin makes a dot, and combinations of dots form letters and illustrations.
Ink-jet printer sprays ink at a sheet of paper. Ink-jet printers produce high-quality text and graphics.
Laser printer uses the same technology as copy machines. Laser printers produce very high quality text and graphics. The speed of printers varies widely. Dot-matrix printers can print up to 500 letters per second, and laser printers can print from about 4 to 20 text pages per minute.