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Whats a Computer?
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A computer is an electronic machine, operating underthe control
of instructions stored in its memory that canaccept data,
manipulate the data according to specied
rules, produce results, and store the results for futureuse.
A computer consists of a variety of hardwarecomponents that work
together with software toperform calculations, organize data, and
communicatewith other computers.
he re!uired components to have a functional computerare" input
devices,output devices, communication
devices, storage devices, and the system unit.
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An input device is any hardware component that allowsa user to
enter data and instructions into a computer.
here are si# fre!uently used input devices" key$oard,mouse,
microphone, scanner, digital camera, and %Ccamera.
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An output device is any hardware component that canconvey
information to a user.here are three common output devices"
printer,monitor, and speakers.
A printer produces te#t onto paper, a monitor displayswords or
graphics, and speakers produce sound so youcan hear the sounds
generated $y the computer.
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A communication device ena$les computer users tocommunicate and
to e#change items such as data,
instructions, and information with other computers.
&ne type of communication device is a modem, whichena$les
computers to communicate $y telephone lines.
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A storage device records and retrieves items to andfrom a
storage medium. hese devices hold data,instructions, and
information for future use.
here are si# commonly used storage devices" 'oppydisk drive, (ip
drive, hard disk drive, C)*+& drive, C)*+W drive, and a
)-)*+& drive.
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he system unit, chassis, protects the internalelectronic
components of the computer from damage.
here are two main components on the
motherboard"centralprocessing unit and memory.
he central processing unit, processor, is the
electronic device that interprets and carries out the
$asicinstructions that operate the computer.
he memory is a temporary holding place for data
andinstructions.
oth of these components consist of chips, which is anelectronic
device that contains many microscopicpathways that carry electrical
current.
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