Definition:
A Scanner or digitizes is an input device that can moved over a drawing or photograph/ text to convert it into digital data. It is developed by Russell kirsch in 1957.
- It directly can enter data into the computer without pressing any key.
Types of Scanner:
1. OCR scanner(Optical Character Recognition/Reader)
- Read and detect any printed/ written character.
- Direct entry input device.
2. OMR(Optical Mark Recognition/Reader)
- Used in check the answer sheet (Multiple Choice question) or lottery Sheet.
- It detects the letter mark by pencil or pen.
- It mostly used in Exam to produce result.
3. MICR(Magnetic Ink Character Read/REcognition)
- Read the character that have been printed in magnetic ink (used iron oxides)
- Used in Bank.
- Read the cheque holder name and account number.
4. BCR (Bar Code Reader)
- Read the bar code and convert the electrical pulses and send to computer.
- Used is mass market
