Venn Diagram
Venn Diagrams are illustrations used in the branch of mathematics known as set theory. They show the mathematical or logical relationship between different groups of things (sets).
A Venn Diagram was introduced by the British philosopher and mathematician John Venn (18341923) in 1881 and visually shows all the possible logical relations between the sets. This diagram can be interpreted as the relationships of sets which may have some (but not all) elements in common.
Example 1. Venn Diagram  Relationship Marketing
The combined area of sets in a Venn Diagram is called the union of sets. Sometimes there is a rectangle around the Venn diagram to show the space of all possible elements. This rectangle represents socalled Universal set. A Venn Diagram is usually used to divide up two or more objects to highlight similarities and differences.
Venn Diagrams visualize all the possible logical relations between sets. They are used to illustrate simple set relationships in logic, statistics, mathematics, sociology, philosophy, marketing, etc. Venn Diagrams are also commonly used to visually summarize the status and future viability of a project.

Example 3. Venn Diagram  Sustainable Development
There are some similar diagram types, based on Venn Diagram:
 Euler diagrams similar to Venn Diagrams, but they may not describe all the possible relations.
 Johnston diagrams, which are used to illustrate statements in propositional logic, such as "Neither A nor B is true", and are a visual way of illustrating truth tables.
 Karnaugh maps or Veitch diagram are another way of visually representing Boolean expressions.
 Peirce diagrams, devised by Charles Peirce, are extensions to Venn diagrams which include information on existential statements, disjunctive information, probabilities, and relations.
Example 3. Venn Diagram  Knowledge
This simple example was created in ConceptDraw DIAGRAM using the Business Diagrams Solution. It shows the use of Venn Diagram to compare two people groups. One circle represents all the information people know about the stock market in Britain, the other circle represents all the information they know about stock market in Germany. Any features the two areas share can be written in the intersection of the circles. The result shows at a glance what the two markets have in common and what features are different.
Use Business Diagrams solution to quick and easy design your own Venn Diagram of any complexity.
The Venn Diagrams designed with ConceptDraw DIAGRAM are vector graphic documents and are available for reviewing, modifying, converting to a variety of formats (image, HTML, PDF file, MS PowerPoint Presentation, Adobe Flash or MS Visio), printing and send via email in one moment.
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Electrical Engineering Solution used together with ConceptDraw DIAGRAM drawing facilities makes short a work of drawing various electrical and electronic circuit schemes. A library of vector objects composed from symbols of Analog and Digital Logic elements of electric circuit includes 40 symbolic images of logic gates, bistable switches of bistable electric current, circuit controllers, amplifiers, regulators, generators, etc. All of them can be applied in electronic circuit schemes for showing both analog and digital elements of the circuit.Picture: Electrical Symbols, Electrical Diagram Symbols
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There are two main types of computer network topologies: Physical topology that show the physical organization of a network  equipment and types of connections. Star network topology involves a set of devices that is connected to a single hub (router). Ring network topology means that, devices connected according this topology have two connections, connecting with nearby devices to make a loop. Bus network topology is the topology presented at the current diagram. It is similar to a ring topology. The difference is that data moves up and down a linear connection, copying itself where network equipment works as busstations along the way. This network topology can be used for small network, or when adding an extra device into a network.Picture: Network Topologies
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