Input Device's
Keyboard is an input device by which we can enter data in the computer
There are two type of key board 1.Normal keyboard 2. Wireless Keyboard
A mouse is a pointing device by which we can make selection and open files from the screen
There are three types of mouse: 1.Mechanical mouse 2. Optical mouse 3. Wireless mouse
Touch pad is small rectangular device sensitive to pressure and motion it replaces mouse in the laptop.
Track ball is a stationary pointing device with a ball on its top. Ball is rotated by your thumb and it replaces mouse in the laptop.
Pointing Stick is a pressure sensitive pointing device shape like an pencil eraser.That is positioned between keys on the keyboard to move the pointer u push the pointing stick with your finger and it replaces mouse in the laptop.
The most common device used to input images into a computer is a scanner. Scanners are similar to copy machines, except they store the image electronically instead of transferring it into another piece of paper.
Optical Character Recognition (OCR) It is a technology that involves reading type written, computer printed or hand written character's from odinary documents and translating the images into a form that the computer can understand. Most OCR devices include a small optical scanner for reading characters and sophisticated software for analyzing what is read.
Optical Mark Recognition (OMR) A scanner that reads marks on specific areas of the page it can read hand drawn marks such as small circles. A person places these marks on a form such as test and answer sheet. The OMR device then reads the document and matches there patterns of light against the answer key sheet.Bar Code Scanner A device specialized for reading bar codes and converting them into the ASCII code.
A Light sensitive pen wired to a video terminal and use to draw picture or select menu option.The user brings the pen to the desired point on the screen and press the pen button to make contact. The pen sense light and the pixel being illuminated at that instant identifies the screen location.
With touch screen you can intract with the computer device by touching areas of the screen with your finger.You can touch words, picture, numbers etc on the screen.
Digital camera is completely different than the traditional camera it captures the images and stores the images in the digital format. The image quality of a digital camera depends on its resolution.
It captures live videos which can be sent over the internet.It is generally used in chating, video conferencing over the internet
It is an input device that records video in a digital format.