A Venn diagram is a widely used diagram style that shows the logical relation between sets. It is an illustration that uses circles or other shapes to show the relationships among things or finite groups of things. Venn diagrams are used to depict how items relate to each other against an overall backdrop, universe, data set, or environment. They are used to teach elementary set theory, and to illustrate simple set relationships in probability, logic, statistics, linguistics, and computer science. Venn diagrams use simple closed curves drawn on a plane to represent sets, and these curves are often circles or ellipses. A Venn diagram consists of multiple overlapping closed curves, usually circles, each representing a set. The interior of the circle symbolically represents the elements of the set, while the exterior represents elements that are not members of the set. Venn diagrams are useful for illustrating how different concepts or factors intersect with one another. They can show, at a glance, how things are similar or different and where and how they overlap. Venn diagrams are widely used in mathematics, statistics, logic, teaching, linguistics, computer science, and business. They are used to think through and depict how items relate to each within a particular “universe” or segment. Venn diagrams allow users to visualize data in clear, powerful ways, and therefore are commonly used in presentations and reports.