Sprays ink at a sheet of paper. Uses the same technology as copy machines. Laser printers produce very high quality text and graphics. Similar to a laser printer, but uses liquid crystals or light-emitting diodes rather than a laser to produce an image on the drum. Contains a chain of characters or pins that print an entire line at one time.
Line printers are very fast, but produce low-quality print.
An inexpensive printer that works by pushing heated pins against heat-sensitive paper. Thermal printers are widely used in calculators and fax machines. These bits are arranged in a pattern, called a bit map, and can then be stored in a file, displayed on a screen, and changed by programs. Therefore, you cannot directly edit text that has been scanned. Most optical scanners sold today come with OCR packages.