Index - O
| Off | |
| 1 (Type/Class) | Data.Prim |
| 2 (Data Constructor) | Data.Prim |
| offForProxyTypeOf | Data.Prim |
| offForType | Data.Prim |
| offToByteCount | Data.Prim |
| offToCount | Data.Prim |
| oneShot | Foreign.Prim |
| onException | Control.Prim.Exception |
| Option | |
| 1 (Data Constructor) | Data.Prim |
| 2 (Type/Class) | Data.Prim |
| option | Data.Prim |
| or# | Foreign.Prim |
| ord# | Foreign.Prim |
| orI# | Foreign.Prim |
| Overflow | Control.Prim.Exception |