Output
Devices
Once the user has
managed to input the commands and
information required into the computer, there are several output devices for
the computer to pass that information back to the user. The most obvious is the
computer monitor, sometimes known as a VDU or visual display
unit. Modern monitors offer high resolution (quality) images and generally do
not suffer from the irritating flicker or strobing effect that were common a
few years ago. Nontheless, it is important to select the largest, brightest
screen that will fit in your workplace and that your wallet can afford, as you
will spend a lot of time looking at it. It is expected that the older CRT
(cathode ray tube) monitors will be replaced by flat panel screens within
the next few years, just as the older televisions are being replaced by larger,
flatter screens. These LCD (or liquid crystal display) are considerably
lighter and produce far less heat than the older monitors. One of the most
important output devices to add to any computer system is a printer. The
best value currently are inkjet printers which can produce stunning
quality colour prints. They work by silently squirting microscopic droplets of
ink at the page from a colour and a black ink cartridge. The resolution and definition of
image from some of these printers rivals the prints produced by traditional
photo developers. Inkjet printers can be slow and the cost of replacement
cartridges can be very high.
Laser printers generally produce black and white prints (although colour
laser printers are reducing in cost all the time) and are preferred in
offices as they are much faster than inkjet printers, have a higher paper
capacity and are cheaper per page than inkjets.
REFERENCE
http://en.wikipedia.org/wiki/Output_device
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