Index - O
| o | Data.Category.NaturalTransformation |
| Obj | Data.Category |
| ObjectsFOver | Data.Category.Comma |
| ObjectsFUnder | Data.Category.Comma |
| ObjectsOver | Data.Category.Comma |
| ObjectsUnder | Data.Category.Comma |
| Omega | Data.Category.Omega |
| Op | |
| 1 (Type/Class) | Data.Category |
| 2 (Data Constructor) | Data.Category |
| Opposite | |
| 1 (Data Constructor) | Data.Category.Functor |
| 2 (Type/Class) | Data.Category.Functor |
| outF | Data.Category.Dialg |