The study of signs and symbols and their use or interpretation. Visual cues, or signs, are combined into patterns that transmit messages to the viewer.
Philosopher/scientist Charles Sanders Peirce (1839 – 1914) categorised signs as: Iconic,Symbolic and Indexical. An Iconic sign looks like what it represents –
A Symbolic sign does not look like what it represents and its meaning must be learnt.-
An Indexical sign is a clue that links meanings.