When many copies are required, printing processes are more economical. Generally, photocopying is practical when just a few copies of an original are needed. Process whereby written or printed matter is directly copied by photographic techniques. Laser printers form an image of the output on a selenium-coated drum using laser light that is turned on and off by data from the computer and then transfer the output from the drum using photocopying photocopying,
Ink-jet printers, including bubble-jet printers, squirt heated ink through a matrix of holes to form characters or images.
Nonimpact printers use thermal and electrostatic, rather than mechanical, techniques. Although noisy, impact printers can produce multiple copies of business forms simultaneously using carbon or carbonless techniques. A dot matrix printer uses a matrix of tiny pegs that, when hit from behind against a ribbon, impart a set of dots to form a character on the paper a wide variety of characters and graphics is created using different dot combinations. A formed character printer forces metal or plastic characters against an inked ribbon to produce a sharp image on paper the characters may be on a moving bar, a rapidly rotating chain, a rotatable ball, or wheel spokes. Impact printers, which mostly have been superseded by ink-jet and laser printers, use a mechanical hammering device to produce each character. Click the link for more information., smartphone, or the like on paper or another medium. Lightproof box or container, usually fitted with a lens, which gathers incoming light and concentrates it so that it can be directed toward the film (in an optical camera) or the imaging device (in a digital camera) contained within. Click the link for more information., digital camera camera, A computer is distinguished from a calculating machine, such as an electronic calculator, by being able to store a computer program (so that it can repeat its operations and make logical
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Printer, device that reproduces text, images, or other data from a computer computer,ĭevice capable of performing a series of arithmetic or logical operations.
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