Mouse and/or Mice
The history of the mouse is rather cloudy in the minds of most. The
mouse was developed as a component of a new GUI (or Graphical User Interface)
for PCs. Originally, computers functioned by keywords typed in by the user.
A few people at Xerox Palo Alto Research Center (PARC) developed a new
GUI that used pictures to represent different computer entities. In order
to interact with the interface, a new device was introduced into the computer
world. This device was the mouse. The first mouse was essentially the same
as the one you are using right now. The mouse signals the computer when
horizontal and vertical movements occur. Then, the computer simulates a
moving object on the screen. The mouse interprets the movements using two
methods: opto-mechanical and optical. There is also another version
of the opto-mechanical mouse called the trackball.
