Magnetic ink character recognition (MICR)

An MICR identify character printed with a special ink that contain particles of magnetic material. This device particularly finds application in banking industry. Since the MICR system can recognise only certain character styles. The characters styles the characters have to be accurately formed.

Optical mark recognition (OMR)

Optical mark recognition, also called mark sense reader, is a technology where an OMR device senses the presense or tha absence of the mark, such as pencil mark. OMR is widely used in tests such as aptitude tests.

Bar code reader

These devices are gernealy available in super markets, bookshopes, etc. bar-code readers are photoelectric sacnners that read the bar codes of vertical zebra stripped marks, printed on a product containers. Supermarkets use a bar code system called the universal product code (UPC). The bar code identify the product tro the super market computer which has a discripation and the latest price.