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Two main lines of development can be discerned within [[semiotics]]: the European line associated with [[Ferdinand de Saussure]] (which [[Saussure]] himself baptized with the name of "[[semiology]]"), and the North American line associated with [[Charles S. Peirce]].

[[Image:SAUSSUREANSIGN.gif|thumb|300px|right|The Saussurean Sign]]

According to [[Saussure]], the [[sign]] is the basic unit of [[language]]

For [[Lacan]], this [[algorithm]] defines "the [[topography]] of the [[unconscious]]."<ref>{{E}} p.163</ref>

According to [[Peirce]], the [[sign]] is something whcih represents an [[object]] to some interpretant (the term "object can mean, for [[Peirce]], a physical thing, an event, an idea, or another [[sign]]).