Use this template to design your four set Venn diagrams.
In maths logic Venn diagram is "a diagram in which mathematical sets or terms of a categorial statement are represented by overlapping circles within a boundary representing the universal set, so that all possible combinations of the relevant properties are represented by the various distinct areas in the diagram". [thefreedictionary.com/Venn+diagram]
The template "4-set Venn diagram" for the ConceptDraw PRO diagramming and vector drawing software is included in the Venn Diagrams solution from the area "What is a Diagram" of ConceptDraw Solution Park.