Semiotics, signs, symbols and the semiotic web

There are three main types of symbols that we use throughout the world and the web and I'm going to be conducting some research oh the differances between them.

The first type of symbol I'm going to look at is called an: Icon

An Icon is a symbol or small picture that resembles what you or the person is trying to get across there are lots of examples of these all over the place for example:

Weather signs and no smoking signs are icons:

The Second type of symbol i'm going to look into are called: Index's

Index's are alot like Icon's but instead of resembling something there is a direct link between the image/sign and what it means... for example road and street signs:

The last type of symbol I'm going to look at is actually called: Symbols

Symbols have no logical meaning to what it stands for but we all know what it means regardless there are lots of examples for this and most of them are featured online or on web-pages... for example

Favourites/bookmarks have a star sign next to it.
And the safari logo simply has a compass.

And this concludes my research on symbols.