Editing Tree structure (section)

== Examples of tree structures ==
[[File:Tree Map.png|thumb|A tree map used to represent a [[directory structure]] as a [[nested set]] ]]
[[File:1934-Thermionic-Tube-Chart.jpg|thumb|A diagram in the shape of a tree illustrating the "evolution" of thermionic tubes (a type of vacuum tube) between 1883 and 1934]]

* Internet:
** [[usenet hierarchy]]
** [[Document Object Model]]'s logical structure,<ref>{{cite web |url=http://www.w3.org/TR/DOM-Level-2-Core/introduction.html |title=What is the Document Object Model? |access-date=2006-12-05 |work=W3C Architecture domain |archive-date=2012-02-12 |archive-url=https://web.archive.org/web/20120212033934/http://www.w3.org/TR/DOM-Level-2-Core/introduction.html |url-status=live }}</ref> [[Yahoo!]] subject index, [[Curlie]]
* [[Operating system]]: [[directory structure]]
* Information management: [[Dewey Decimal Classification|Dewey Decimal System]], [[Polythematic Structured Subject Heading System|PSH]], this hierarchical bulleted list
* Management: hierarchical [[organization]]al structures
* Computer science:
** [[binary search tree]]
** [[red–black tree]]
** [[AVL tree]]
** [[R-tree]]
** [[doubly logarithmic tree]]
* Biology: [[evolutionary tree]]
* Business: [[pyramid selling scheme]]
* Project management: [[work breakdown structure]]
* Linguistics:
** (Syntax) [[Phrase structure rules|Phrase structure trees]]
** (Historical Linguistics) [[Tree model]] of language change
* Sports: [[business chess]], [[Bracket (tournament)|playoffs brackets]]
* Mathematics: [[Von Neumann universe]]
* Group theory: [[Descendant tree (group theory)|descendant trees]]