Input & output devices 1122

INPUT & OUTPUT DEVICES
By : Air 10B

INTRODUCTION
 An Input Devices is a piece of hardware that is
used to enter data into a computer or content into a
computer system.

There are two types of input, they are :
 Manual Input Devices

 Automatic Input Devices

 An Output Devices is a piece of hardware that
obeys a computer command to do something that is
real.

MANUAL INPUT DEVICES

Examples of Manual Input Devices:

 Keyboard
 Tracker ball
 Mouse
 Joystick
 Concept keyboard
 Touch screen
 Scanner
 Digital cameras
 Graphics Tablet
 Microphone

Keyboard
 Keyboard is the most common and widely used
for input devices.
 It is made up of buttons called 'keys'. The keys
are arranged into sections, for example :
 Alphabet keys
 Command keys (insert, delete, home, end, page up/down)

Concept Keyboard
 A concept keyboard is a flat board that contains
a grid of buttons.
 Concept keyboards are used when fast input is
needed and are suitable for selecting things from
a limited range of choices such as fast food
restaurants.

Mouse
 Mouse is the most common and widely used for input devices.
 A mouse has two buttons, a right and left one and also a
central wheel which allows you to scroll up and down the page.
The left one have different function to the right one, the left clicking
usually lets you to choose a menu item and the right clicking brings to the
menu to select the task.

Tracker ball
 Tracker ball are particularly easy for who like to
limited their movement in their hands.

Joystick
 Joystick is popular for the gamers, who wants to be
a controllers in the games.

Digital Camera
 A digital camera takes pictures and can usually record
video too.
 The pictures it takes and the videos recorder are been
stored in files.

Microphone
 A microphone can be used to input sound.

Scanners
 Scanners can be used to copy the images or text
on paper into a digital format that can be used by the computer.

There are two type of scanners are :
 Flatbed Scanners
 Handheld Scanners

Graphics Tablet
 Graphics tablets are often used by graphics
designers .
 Graphics tablets can be use for drawing because
it’s made more accurate than drawing
by mouse.

Touch screen
 Touch screens are not common used to input
a large amounts of data.
 Touch screens are easy to use and this often
been found in public places, such as banks.
 Touch screen is a device which works for both
devices of input and output .

AUTOMATIC INPUT DEVICES

Examples of Automatic Input Devices:

 Magnetic Ink Character Recognition (M.I.C.R)
 Optical Character Recognition (O.C.R)
 Optical Mark Reader (O.M.R)
 Magnetic Stripe Readers
 Barcode Readers

Magnetic Ink Character Recognition (M.I.C.R)
 Magnetic Ink Character Recognition are often
use in bank to check the cheque number.
 This will been provides a high level of the security.
 The M.I.C.R will only recognize numbers printed in
a standard font by using the magnetic ink for checking.

Optical Character Recognition (O.C.R)
 An O.C.R system is a normal scanner with some special software.
When the scanner scan piece of paper into the computer and when it’s
finish the O.C.R software then examines the page and changes the letters
into a form that can be edited or processed by a normal word processing
package.

Optical Mark Reader (O.M.R)
 Optical Mark Reader interprets the pattern
of marks then sends the results to the computer
for analysis and reporting.

Magnetic Stripe Readers
 Magnetic strips are usually found at the back of
most credit cards.
 The Magnetic Strip Reader can read personal details
about the card number such as account number and name.

Barcode Readers
 A Barcode Reader is an automatic input device which
is use to scan or read the barcode.
 The barcode doesn’t contain the price of the item.

OUTPUT DEVICES

Examples of Output Devices :

 Monitors
 Printers

 Laser Printers

 Ink-Jet Printers

 Dot-Matrix Printers

 Plotters

 Speakers

Monitor
 A monitor (or screen) is the most common
use for output devices.
 The picture on a monitor is made up of thousands
of tiny colored dots called pixels.
 The higher the number of pixels, the better quality
of the output.

Printers
 Printers are another common output devices.
 Most of the printers produce their output on
paper but that doesn’t mean that the printer can do
there printing only on the paper.

Laser Printers
 Laser printers are used in many workplaces
because they can print a large number of sheets
very quickly and they produce high quality
documents.
 Laser printers are quite expensive too because
there produce a high quality of output and quiet fast.

Ink-Jet Printers
 Ink-jet printer are cheap and this are common use at home.
 The color that it’s been printer out doesn’t need to be perfect.

Dot-Matrix Printers
 Dot-Matrix are the first type of printers that
had been used at homes and schools but now
as the technology goes on they are not used
much nowadays.
 Dot-matrix printer are noisy and low quality.

Plotters
 Plotters are a type of printer which is able to
draw a high quality images on a very large
pieces of paper. The paper were about 3 foot
wide and 10 foot long.
 The people who want to buy or use this plotters need to know
how to use it as well.
 Plotter are been used by the engineers, architects and map-makers to
draw plans of buildings, diagrams of machines or large scale maps

Speakers
 Speakers usually produce a much higher quality
of sound than the internal speaker.

Input & output devices 1122

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Input & output devices 1122