Definition:- The computer keyboard is the basic device through which you input information into the system. Though many other forms of inputting devices have come out in the market today, there is nothing equivalent to the keyboard.
There are many tasks that you can accomplish using the keyboard. You can use it to type out your documents, access menus, manipulate your system and much more. The keyboard also includes shortcut keys that enable you to carry out certain tasks more easily and quickly using just the keyboard. Usually a keyboard has something between 80 to 110 keys. The difference in the keys setup is based on many factors such as board’s manufacture, the operating system they are made from, whether they are part of a PC system or they are part of a laptop or hand-held device.
In addition to the typing keys, the keyboard also has a numeric keypad through which you can input numbers. It has control keys like Home, Page Up, Page Down, Insert, Delete, End, Control (Ctrl), Alternate (Alt), and Escape (Esc) that let you carry out these simple tasks with just one click.
You may wonder how the keyboard functions. Well, it’s pretty simple. When you press any key on the keyboard you actually turn on a switch. This sends the message to the processor that a particular key has been pressed and you see the output on your screen. If you were to hold a key down continuously for some time, it is considered to be a repetitive pressing of that key and so you see that output on the screen.
More info on computer keyboards can be found at http://en.wikipedia.org/wiki/Keyboard_(computing)
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