How the Mouse Works.

How the Mouse Works.
There is nothing natural or intuitive on a keyboard. No child is born knowing how to type and even come to know,  there is not much sense of it - no one can explain satisfactorily why the alphanumeric keys are
the way they are arranged.
For many, the keyboard is still a barrier to learning to use a computer. Even more to the digitizer
experienced, there is nothing intuitive in type / FS to write a file in Lotus 1-2-3. Engineers - sure
none a great typist - Research Center Palo Alto (PARC) of Xerox Corporation developed a
concept first explored by Douglas C. Engelbert of Stanford Research Center. The concept was a
pointing device, something that the user could move with his own hand, producing a corresponding movement in the screen.
Due to its size and wire similar to a mouse tail, the device is called a mouse (mouse,
in English). Apple Computer made it a standard component of its Macintosh computers, and the popularity of Windows,  the mouse later became an indispensable item also on PCs
The mouse is not the only pointing device was invented. The joystick used in games also does the same thing,
but not with equal ease. The tablets are popular among engineers and architects who need transform precise movements of the pen lines on the screen. Touch screens, you press your finger or a stylus light to control the program is very tiring to be used for a very long time.

The mouse and his cousin, the trackball, survived the cumbersome methods of keyboard navigation. They will never replace the keyboard, but can complement it running tasks such as moving objects on screen and point, for which the keys cursor left much to be desired. Until we get to the point where I just talk with our PCs, the mouse will be part integral of systems which we use.
The mechanical mouse became the pointing device popular with the latest generation of operating environments
- Graphical interfaces represented by Windows, Macintosh, and OS / 2. With the mouse, you control your PC pointing pictures  instead of typing commands.

Source: Evolution of Computers