 Although this is a general picture of Peirce’s ideas about sign structure, and certain features are more or less present, or given greater or lesser emphasis at various points in Peirce’s development of his theory of signs, this triadic structure and the relation between the elements is present in all of Peirce’s accounts. In what follows, we shall see three of Peirce’s attempts at giving a full account of signs and signification, the corresponding sign typologies, look at the transitions between these accounts, and examine some of the issues that arise from them.