Displays
There are many different instrument panel designs and layouts. The two basic types of instrument panel displays are analog and digital. In a traditional analog display (Figure 21-3), an indicator is often a needle but it can also be a liquid crystal or graphic display. A digital display uses numbers instead of a needle or graphic symbol. Analog displays show relative change better than digital displays (Figure 21-4). They are useful when the driver must see something quickly and the exact reading is not important. For example, an analog tachometer shows the rise and fall of the engine speed better than a