1. The Computer Mouse "It was nicknamed the mouse because the tail came out the end," Douglas Engelbart

2. Who Invented It? Douglas Engelbart changed the way computers worked in 1964. He invented the computer mouse, a user friendly tool that anybody can use.

3. How Does It Work? Optical Mouse: The most common type of mouse in use today. This mouse uses optical technology, so it doesn’t require moving parts. The LED light inside the mouse, reads the pattern or grid on the surface. The mouse converts this data into meaningful motion data that is sent to the computer Mechanical Mouse: This type of mouse was the first one around which uses a moving ball inside to work. As you move the mouse across a surface, the ball moves too. Two rollers are also inside the mouse which track the horizontal and vertical movement of the ball. The motion of the rollers send electrical signals to the computer. The software converts these signals into the movement you see on the screen. Laser Mouse: This mouse works very similar to the optical mouse, but produces better results. Laser mice can work flawlessly on any type of surface.

4. Bigger or Smaller?

6. The design has also become more comfortable to hold, as the first computer mouse was quite square.

7. Motion detectors have changed from a tracking ball, to an LED light, and now a laser. This improves the quality of motion you see on the screen, and also eliminated the use of mouse pads.