Semiotics

This class we talk about the function of sign: icon, index, symbol. Some sign has multiple function, for example the toilet sign.

How they indicate to you that this is a toilet sign. As two significant icon of male and female place next to each other, what will you receive from the icons? It's a place that for male and female. How do you know this place is toilet? On the index function that the sign tell us, this is a toilet due to the common sense of our society. We must saw or used any toilet with this sign then we understand when two icon that represent male and female place next to each other that this sign may indicate to a meaning, toilet.

So, you can find out many other kind of toilet signs who use these icon and index function.