The famous Venn diagrams that we know today were first introduced in the late 19th century by John Venn, an English logician. Venn diagrams are a simple graphical representation of mathematical sets, which are used to visually represent the logical relationships between two or more sets of data. With the help of circles, the diagrams can help to demonstrate the connections between the various data points, making them an invaluable tool for problem-solving in fields such as mathematics, science, technology, engineering and medicine.

Today, Venn diagrams are widely used across industries, from business and marketing to education and research, to help visualize data, explain complex relationships, and solve problems. Venn diagrams have become an indispensable tool for data visualization and analysis and are used in classrooms around the world to help students better understand and visualize information.

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source: Phys.org