Index - O
| O | |
| 1 (Type/Class) | Data.DynamicOrd |
| 2 (Data Constructor) | Data.DynamicOrd |
| Only | Data.Ext.Multi |
| Open | Data.Range |
| OpenRange | Data.Range |
| Orbit | Data.Permutation |
| orbitFrom | Data.Permutation |
| orbits | Data.Permutation |
| OrdDict | |
| 1 (Type/Class) | Data.DynamicOrd |
| 2 (Data Constructor) | Data.DynamicOrd |
| OrdSeq | Data.OrdSeq |
| outgoingEdges | Data.PlanarGraph.Core, Data.PlanarGraph |