Thursday 16 June 2011

Input and Output

Ergonomic Keyboard


A keyboard that separates the keys into two halves shaped like a wide "V." Some keyboards have a fixed layout, while others are movable. To the touch typist, the layout feels odd at first, but it puts less stress on the hands and wrist and winds up being comfortable for most people.


Inkjet Printer




A printer that forms an image by using electromagnetic fields to guide electrically charged ink streams onto the page.




Laser Printer


A printer that uses a laser to produce an image computer on a rotating drum before electrostatically transferring the image to paper.


Magnetic Ink Character Recognition


Ink containing magnetic particles to permit reading of printed characters by a magnetic character reader as well as by humans.




Optical Character Recognition


Often abbreviated OCR, optical character recognition refers to the branch of computer science that involves reading text from paper and translating the images into a form that the can manipulate (for example, into ASCII codes).



Optical Mark Recognition


 OMR technology scans a printed form and reads predefined positions and records where marks are made on the form. This technology is useful for applications in which large numbers of hand-filled forms need to be processed quickly and with great accuracy, such as surveys, reply cards, questionnaires and ballots

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