Group-Like Objects
- Abelian Semigroup
- Algebraic Loop
- Block Monoid
- Bol Loop
- Braun's Conjecture
- Building
- Commutative Monoid
- Elasticity
- Free Idempotent Monoid
- Generalized Bol Loop
- Groupoid
- Half-Bol Identity
- Hypergroup
- Inverse Semigroup
- Lie Groupoid
- Loop
- Monoid
- Moufang Loop
- Pair Groupoid
- Pseudogroup
- Quasigroup
- Semigroup
- Semigroup Algebra
- Submonoid
- Topological Groupoid