+**Order theory** is a branch of mathematics that formalizes the intuitive notion of order, studying binary relations that capture concepts like "less than" or "is a subset of" within a [Set Theory](/wiki/set_theory) context. It delves into the structure and properties of these relationships, often through the lens of specific types of [Binary Relation](/wiki/binary_relation), revealing fundamental patterns in collections of objects.
+## See also
+- [Partial Order](/wiki/partial_order)
+- [Lattice](/wiki/lattice)
+- [Graph Theory](/wiki/graph_theory)
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