Monday, 23 July 2012

Input Devices

Input devices are used to feed data into a computer. For example Keyboard, Mouse, Scanner are some of the examples of input devices. It is also defined as a device that provides communication between the user and the computer. Input devices are capable of converting data form man language to machine language (Computer Language). A computer can have several input devices.


* Keyboard

* Mouse

* Touch Screen

* Scanner

* Bar Code Reader

* Digital Camera

* Magnetic Ink Character Recognition (MICR)

* Light Pen

* Microphone

* Smart Cards

* Magnetic Reader


Keyboard:

The Keyboard a common Input devices. Keyboard consist of set of alphabetic, numerical and Symbols Keys.


Mouse:

Mouse is used control the movement of the cursor on the screen. If we like to open a application in our  computer by Left clicking the Application


Touch Screen:

It is a type of screen which have a touch sensitive panel. You can use your fingers to directly touch the objects on the screen. The touch screen senses the touch on the object and communicate the object selection to the computer.


Scanner:

Scanner is an input device that allows information such as an image of text to be input in to a computer. It can read images text printer on a paper and translate the information in to a form that the computer.


Bar Code Reader:

The bar code readers are used in many places like colleges, supermarket, bookshops, etc.  Bar code is a pattern printed in lines of different thickness. The bar-code reader scans the information on the codes and transmits to the computer for further processing.


Digital Camera:

Digital camera is an input device mainly used to capture images. The digital camera takes a still photograph, stores it and sends it as digital input to the computer. It is a modern and popular input device.


Magnetic Ink Character Recognition (MICR):

MICR is widely used by banks to process cheques. Human readable numbers are printed on documents such as cheque using a special magnetic ink. The cheque can be read using a space input unit, which can re recognize magnetic ink characters. ?It also saves time, ensures security and accuracy of data.


Light Pen:

A light pen is a pointing device shaped like a pen and is connected to a monitor. The top to the light pen contains a light sensitive element which, when placed against the screen, detects the light from the screen enabling the compute to identify the location of the pen on the screen.


Magnetic Reader:

Magnetic reader is an input device which reads a magnetic strip on a card. It is handy and data an be stored and retrieved also provides quick identification of the card'd owner.


Smart Cards:

This input device stores data in a microprocessor embedded in the card. This allows information, which can be updated, to be stored on the card. These data can be read and given ad input to the computer for further processing.


Microphone:

Microphone serves as a voice input device. It captures the voice data and input o the computer. Using the microphone along with speech recognition software can offer a completely new approach to input information in to your computer.

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