1.1.3 Pointing Device

In the old days, most computers only have a display and a keyboard as user interfaces. With graphical user interfaces (GUIs) , it becomes important to also have a ``pointing device''.

Because GUIs concepts unique to computers (and mostly in the past 20 years), it is important to expand this section into smaller sections that address the general concepts of a GUI, then back to the explanation of pointing devices.