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output is

data that has been processed into a useful form

computers process data (input) into


four categories of output are

text, graphics, audio, and video

output device is

any hardware component that conveys information to one or more people

commonly used output devices include

display devices, printers, speakers, headphones, and earphones, fax machines and fax modems, multi-function peripherals, data projectors, interactive whiteboards, and force-feedback joysticks, wheels, gamepads, and motion-sensing game controllers

types of flat-panel displays

LCD monitors, LCD screens, and plasma monitors

flat-panel display is

a display with a shallow depth that typically uses LCD or gas plasma technology

LCD monitor

a desktop monitor that uses a liquid crystal display to produce images

liquid crystal display uses a liquid compound to

present information on a display device

plasma monitor is

a display device that uses gas plasma technology, which substitutes a layer of gas for liquid crystal material in an LCD monitor

CRT monitor is

a desktop monitor that contains a cathode-ray tube

CRT monitors have a much larger

footprint than LCD monitors; that is, they take up ore desk space

CRT monitor usually

costs less than an LCD monitor, but it also generates more heat and uses more power than and LCD monitor

users can print by connecting a computer to a printer with a

cable that plugs in a port on the computer

Bluetooth printing uses

radio waves to transmit output to a printer

infrared printing is

when a computer or other device communicates with the printer via infrared light waves

nonimpact printer

forms characters and graphics on a piece of paper without actually striking the paper. Some spray ink other use heat or pressure to create images.

commonly used nonimpact printers

ink-jet, printers, photo printers, laser printers, thermal printers, etc.

impact printer

forms characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper

two commonly used impact printers

dot-matrix printer and line printer

ink-jet printer is

a type of nonimpact printer that forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper

photo printer

color printer that produces photo-lab-quality pictures

laser printer

high-speed, high-quality nonimpact printer that operates in a manner similar to a copy machine, creating images using a laser beam and powdered ink, called toner

thermal printer

generates images by pushing electrically heated peins against heat-sensitive paper

mobile printer

a small, lightweight, battery-powered printer that allows a mobile user to print from a notebook computer or other personal mobile device

label printer

a small printer that prints on an adhesive-type material that can be placed on a variety of items, most also print bar codes

postage printer

special type of lable printer that has built-in scale and prints prostage stamps


sophisticated printers used to produce high-quality drawings, such as blueprints, maps, and circuit diagrams

large-format printer

uses ink-jet technology on a large scale to create photo-realistic-quality color prints

three comonly used audio output devices

speakers, headphones, and earphones

audio output device

a component of a computer that produces music, speech, or other sounds


rest outside the ear

earphones or earbuds

rest inside the ear canal

fax machine

device that codes and encodes documents so that they can be transmitted over phone lines


document sent or received via fax machine

fax modem

modemm that allows you to send and receive electronic documents as faxes

multifunction peripheral

single devicie that looks like a copy machine but provides the functionality of a printer, scanner, copy machine, and perhaps a fax machine

data projector

a device that takes the text and images displaying on a computer screen and projects them onto a larger screen so that an audience of people can see them clearly

interactive whiteboard

a touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen

input devices used to control actions of a player or object in computer games, simulations, and video games

joysticks, wheels, gamepads, and motion-sensing game controllers

force feedback

technology that sends resistance to the device in response to actions of the user, used in todays joysticks, wheels, gamepads, and motion-sensing game controllers

hearing-impared users can instruct programs to

displays words instead of sound

Windows Vista allows visually impared users to

enlarge items on the screen and change other setting, such as increasing the size or changing the color of the text to make text easier to read

blind users can

work with voice output instead of a monitor

Braille printer

prints information in Braille on paper

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