8/13/2019 Peripherals, Pag 28 Completa

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PERIPHERALS

the accessories you plug into your computer are usually called peripherals.ù

the name is a carryover from the early beginnings of computers hen the parts of a computer that

did not actually compute ere located some distance from the central processing unit! on the

 periphery.

input devices

you can communicate ith your pc! telling it hat to do! using to primary input devices! the

"eyboard and the mouse.

the "eyboard remains the most efficient ay to enter te#ts into applications! faster than even the

most advanced voice recognition system that let you tal" to your pc.

the mouse! more correctly termed a pointing device! relays graphic instructions to your computer.

if you ant to s"etch images directly onto your monitor screen! a digiti$ing tablet or"s more as

you ould or" ith a pen.

to transfre images to your pc! a scanner can be used to convert graphics into bit%images.

ith the right softare! it can become an optical character recognition! or &'R system! that readste#t and transforms ords into eletronic form.

a voice recognition! or voice input system! used a microphone to turn the sound aves of your voice

into electrical signals! a processing board that ma"es those signals digital! and sophisticated sotare

that attempts to discern the individual ords you(re spo"en from the digital signal.

display systems

your indo into the mind of your pc is its display system! the combination of a graphics adapter

or video board and monitor or flat%panel dislay.

the display system gives your pc the means to tell you hat it is thin"ing! to slo you your data in

the form that you best understand! be it numbers! ords or pictures.

the to halves of the dislpay system or" hand%in%hand.

the graphics adapter uses the digital signals inside your pc to build a map of hat the final image

should loo" li"e! storing the data for every dot on your monitor in memory.

electronics generate the image that appears on your monitor screen or flat panel display.

more than any other aspect of computing! printer technology has transformed the industry in the last

decade.

here printers ere once the offspring of typeriters! they(ve noe entered the space age ith )ets

and lasers.

the modern pc printer is usually a high speed! high *uality laser printer that creates ten or more

 pages per minute at a *uality level that rivals commercial printing.in")et printers sacrifice the utmost in speed and *uality for loer cost and the capability of printing

colour ithout depleting the green in your budget.