Semiotics is a general theory of all existing languages... all forms of communication - visual, tactile, and so on... There is general semiotics, which is a philosophical approach to this field, and then there are many specific semiotics.
Umberto EcoThe print does not always have the same shape as the body that impressed it, and it doesn't always derive from the pressure of a body. At times it reproduces the impression a body has left in our mind: it is the print of an idea.
Umberto EcoThere is no great sport in having bullets flying about one in every direction, but I find they have less horror when among them than when in anticipation.
Umberto Eco