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the most commonly used input device for entering text and nu
Transcript of the most commonly used input device for entering text and nu
the most commonly used input device for entering text and numbers into a computer.
ergonomic- lets you use more natural and comfortable hand, wrist, and arm positions.
cordless- a battery powered keyboard that transmits data using wireless technology.
specialized- specialized keys that represents items such as those used in fast-food restaurants.
security- provides security features such as biometric finger-print reader, magnetic stripe, and smart card readers
the most common pointing device for personal computers.
mechanical- has a ball located on the bottom that rolls around on a flat surface as you move the mouse.
optomechanical- the same as the mechanical, but uses optical sensors to detect the motion of the ball.
optical- uses lasers to detect the mouse's movements.
wireless- a battery- powered device that relies on infrared waves to communicate with the computers.
trackball mouse- a upside-down mechanical mouse, with the ball on the top.
touch pad- a pointing device with a specialized surface that can convert the motion and position of your fingers to a relative position on the screen
pointing stick- a pressure- sensitive device that looks like a pencil eraser
audio input- sound entered into a computer, includes speech, sound effects and, music.
common features a computer uses.
used to display their device typically desktop computers.
cathode ray tube(CRT)- one of the earliest type of computer monitors, are similar to older models of television sand can display monochrome or color output.
flat-panel- come in two varieties(take up less space than CRT monitors and are much lighter.
liquid crystal display(LCD)
produces an image by manipulating light within a layer of liquid crystal cells
consists of tiny amount of gas that is activated by an electric charge.
produces a paper or a hard copy, of processing results
impact printers- use a mechanism that actually strikes the paper to form letters and images.
non-impact printers- form characters without striking the paper.
laser printer- produces images using the same technology as a copier.
inkjet printer- provides good quality color printing for less expense than a laser printer.
devices that can change images into codes for input to the computer.
image scanners- converts images into an electronic form that you can store into a computer.
bar code- reads bar lines that are printed on products
magnetic - read encoded information on credit cards
wireless- uses bluetooth wireless technology to scan bar code data.