Sets
- Absorbing Set
- Aggregate
- Analytic Set
- Balanced Set
- Borel Hierarchy
- Characteristic Function
- Coanalytic Set
- Collection
- Complement Set
- Countable
- Countable Set
- Definable Set
- Denumerable Set
- Directed Set
- Disjoint Sets
- Element
- Empty Set
- F_sigma Set
- Family
- Finite Set
- First Category
- G_delta Set
- Graphic Matroid
- Graphoid
- Improper Subset
- Independent Set
- Independent Vertex Set
- Index Set
- Inductive Set
- k-Subset
- Kinney's Set
- Matroid
- Meager Set
- Measurable Rectangle
- Minimal Set
- Nonempty Set
- Nonmeager Set
- Oriented Matroid
- p-System
- Perfect Set
- Power Set
- Proper Class
- Proper Subset
- Proper Superset
- Relational System
- Second Category
- Set
- Set Class
- Set Partition
- Singleton Set
- Subset
- Superset
- Tuple
- Union-Closed Set
- Universal Set