The computer keyboard is a type of input device used by the user for manual entry of data and system commands . Has keys representing letters, numbers , symbols and other functions based on the model of the old keyboard machines escrever.1
The most common keyboards are designed for writing text and inserting system commands . Along the rat , is one of the main interfaces between the computer and the user.
The keyboards are essentially formed by an arrangement of buttons or keys . Each button has one or more characters printed or engraved face , and about fifty percent of the buttons produce graphic characters [ citation needed ] .
The keys are connected to a chip inside the keyboard , responsible for identifying the key pressed and send the information to the PC . The means of transportation of information between the keyboard and the computer can be wireless (via wireless , bluetooth or infrared ) or cable ( the most common connectors are PS / 2 and USB , but older computers used DIN standard ) .
Commonly , the keyboards are formed by parallel keys in a flat structure , horizontal , on which the user places his hands to press with the fingers , the keys needed to operate . However , there are several designs of keyboards meant for specific purposes . There is also ergonomic keyboard , wherein the key positioning greater comfort for those search type.
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