Input and output

-Ergonomic keyboard

 An ergonomic keyboard is a designed keyboard to reduce strain on the hand while typing . It usually have a V shape similar according to the humans right and left hands. The downfall of this keyboard is expensive , too bulky ,heavy and not easily portable.


-ink-jet printer

 Printers transfer processed information by the system unit and comes out as paper. The Ink jet printer sprays ink at high speed onto the paper to appear as words or images . This type of printer are the most common used because its reliable , quiet and inexpensive.


-laser printer

 Laser printers uses laser to beam to produce words and images similar to a photocopy machine. The resolution of these printers are high quality . Its more expensive than ink-jet printers but its much faster and are mostly used in offices.


-magnetic-ink character

 Magnetic ink character recognitions(MIRC) is a character recognition technology which are usually used by banks . The MIRC allows technologies to read printed information such as cheques account number. MIRC is different from barcodes because the MIRC can be read by humans too .


-optical-character recognition

 Optical character recognition(ORC) is a technology which is able to transfer hand written images to the computer. Most people use this technology to convert books into online files . On the other hand , people also use it to computerize record books , or to publish something online .


-optical-mark recognition

 Optical mark recognition(OMR) is a device that shines a beam of light onto a paper to leave some reflectivity on the paper. The paper is used to detect darker shades of colours because it blocks the reflection of light rather than the blank areas of the paper. This type of papers are mostly used for examinations