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The monitor is a TV-like device that the
computer uses to display information in
visual form, using text and graphics. It
is also called the VDU, short for Visual
Display Unit.

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The portion of the monitor that displays
the information is called the screen.
The picture on a monitor is made up of
thousands of tiny colour dots called
pixels.

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The cathode ray tube (CRT) is a
vacuum tube containing an electron
gun (a source of electrons or electron
emitter) and a fluorescent screen used
to view images.

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A liquid crystal display (LCD) is a flat
panel display, electronic visual display,
or video display that uses the light
modulating properties of liquid crystals
(LCs). LCs do not emit light directly.

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For a permanent output, you can use a
printer. A printer is a device that
transfers data from a computer onto
paper.

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There are three main types of printers
commonly used with the PC are —

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Laser printers are used to print high
quality professional printings like DTP
works, documents, etc. They can print in
color or black ink. They also can print
more pages per minute than most inkjet
printers and can print more pages per
cartridge.
Toner Cartridge

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Inkjet printers are the most popular
printers for the home. They can print in full
color or in black and white, and can
produce high quality photographs when
used with special paper. They print by
placing small dots of ink on a page to
reproduce text or graphics.

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Inkjet printers are the most popular
printers for the home. They can print in full
color or in black and white, and can
produce high quality photographs when
used with special paper. They print by
placing small dots of ink on a page to
reproduce text or graphics.

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CMY K

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Speakers are used to play sound that
your computer generates. They allow
you to listen to music and hear sound
effects from your computer.

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You can also use headphones so that
only you can hear the computer’s
output.

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A Plotter is an output device, which is
used to generate graphic outputs. It is
mainly used to print maps, medical
reports, designs required by engineers,
etc.

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