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.