A tree diagram in math is a tool that helps calculate the number of possible outcomes of a problem and cites those potential outcomes in an organized way.

Besides the popular wiring diagrams, there are several other types a technician may encounter. These include the pictorial diagram, which also shows the point-to-point connections of the components, ...

UML is used as a representation of the Java programming language. Using sample class and sequence diagrams, you can see how UML conveys unambiguous code-mapping information to developers.