Monday, October 5, 2009

Input and Output


Magnetic Ink Character Recognition(MICR) :
A tool that commonly used in banking area,the technology itself allows the computers to read information (such as account numbers) off of printed documents.


Optical-Character Recognition(OCR) :
The mechanical or electronic device translation of images handwritten, typewritten or printed text into machine-editable text.


Optical-Mark Recognition(OMR) :
It is defined as a scanner device that shines a beam of light onto the form paper. This is because the contrasting positions on the page is utilized to detect the marked are due to reflection of less light than the blank areas of the paper.


Dot-matrix printer :
A computer type printer with a print head that runs in four side(back,front,up and down) on the page with the help of inks .Besides that,the dots,is produced by a tiny rod called a "wire" or "pin", which is driven forward by the power of tiny electromagnet.


Plotter :
Plotters differ from printers in that they draw lines using a pen. As a result, they can produce continuous lines, whereas printers can only simulate lines by printing a closely spaced series of dots.


Photo printer
Commonly it used to print out a high quality photos on a photo paper.



Portable printer :
It is wireless printer that can straightly print out the picture from the digital camera.




Fax machine :
The design just like a normal house telephone but slightly different in sense that this device can transfer a copy of documents including the picture too but using a certain number or code to transfer it.



Multifuntional device :
Multifunctional devices bring the worlds of copying, printing, finishing, and scanning together, all in one neat, using one device without costing you a lot of money.




Internet telephones :
An instrument that converts voice and other sound signals into a form that can be transmitted to remote locations and that receives and reconverts waves into sound signals.Example Skype,Yahoo Messenger and Windows Live Messenger.

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