Information representation

• Tree structure or tree diagram, a way of representing a hierarchical nature of structure in a graphical form
• Decision tree, a tree model of decisions and their consequences
• Parse tree, used in linguistics to represent the syntax of sentences

Mathematics

• Tree (descriptive set theory), a set of finite sequences of elements of X that is closed under subsequences, on a set X
• Tree (graph theory), a connected graph without cycles
• Tree (set theory), like a graph-theory tree, but with a distinguished root, and possibly having chains of transfinite length
• Tree diagram (probability theory), a tree-like representation of a probability space
• TREE, an extremely fast-growing function; see Kruskal's tree theorem

Computing

• Tree (automata theory)
• Tree (command), a recursive directory listing program that produces a depth indented listing of files
• Tree (data structure), a widely used computer data structure that emulates a tree structure with a set of linked nodes
• Tree network, a type of computer and communication network topology
• Digital tree, prefix tree or trie, a computer science ordered tree data structure.

ENGLISH WORDS OF OTHER LANGUAGE ORIGIN