 A Venn diagram consists of multiple overlapping closed curves, usually circles, each representing a set.The points inside a curve labelled "S" represent elements of the set "S", while points outside the boundary represent elements not in the set "S".This lends to easily read visualizations; for example, the set of all elements that are members of both sets "S" and "T", "S" ∩ "T", is represented visually by the area of overlap of the regions "S" and "T".