Tree structure
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A tree structure, tree diagram, or tree model is a way of representing the hierarchical nature of a structure in a graphical form. It is named a "tree structure" because the classic representation res
The original Encyclopédie (1752) used a tree diagram to show the way in which its subjects were ordered.
A diagram in the shape of a tree illustrating the "evolution" of thermionic tubes (a type of vacuum tube) between 1883 and 1934
Family tree
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A family tree, also called a genealogical tree or a pedigree chart, is a chart representing family relationships in a conventional tree structure. More detailed family trees, used in medicine and soci
Tree structure
…Finally, "science", "art" and "craft", as leaves, are ancestors of no other node. Tree structures can depict all kinds of taxonomic knowledge, such as family trees, the biological evolutionary tree, the evolutionary tree of a language family, the grammatical structure of a language (a key example being S → NP VP…
Three generations of ancestors (born from 1824 to 1916) placed on a Swedish kurbits tree
An ahnentafel family tree, showing three generations of the Kennedy family
Family trees are an age-old phenomenon. This example dates from the sixteenth century.