Types Scanners

Types Scanners

Optical character Recognition (OCR).ln this, characters are read with the help of a light. This is used in office atomization, documentation in library etc.

    Optical mark recognition (OMR).lt is a technology where an OMR device senses the presence or absence of a mark such as a pencii mark. OMR is used in tests such as aptitude tests.
    Optical barcode recognition (OBCR).Barcode readers are photoelectric scanners that read the bar codes or vertical zebra striped marks printed on product containers. This is used in super markets, book shops etc.

MICR

It is a character recognition technology used primarily by the banking industry to facilitate the processing of the cheques. MICR characters (cheque No., Acc.No.etc) are printed in special ink usually containing iron oxide.

MICR provides a secure, high speed of scanning and processing information. It scans about 2600 cheques/min.

Output devices

Any device that is capable of representing information on a computer is called an Output device. OUtPUt devices receive information from the CPU and present it to the user in the desired form. Some important OutPUt devices are: Monitor, Printer, speakers, etc.

Monitor. It is similar to TV screen- either a monochrome (black & white) or colour – and it displays the output. It is also referred as Visual Display Unit (VDU). Several types of monitors are in use. Some of them are Colour Graphic Adapter (CGA), Enhanced Graphics Adaptor (EGA), Video Graphics Adapter (VGA) and Super Video Graphics Adapter (SVCA). The screen sizes differ from system to system.