Index - O
| objectName | NumHask.Prelude |
| odd | NumHask.Prelude |
| on | NumHask.Prelude |
| OnDecodeError | NumHask.Prelude |
| one | NumHask.Prelude |
| OnError | NumHask.Prelude |
| onException | NumHask.Prelude |
| openFile | NumHask.Prelude |
| Option | |
| 1 (Data Constructor) | NumHask.Prelude |
| 2 (Type/Class) | NumHask.Prelude |
| option | NumHask.Prelude |
| optional | NumHask.Prelude |
| or | NumHask.Prelude |
| orAlt | NumHask.Prelude |
| Ord | NumHask.Prelude |
| ord | NumHask.Prelude |
| Ordering | NumHask.Prelude |
| ordNub | NumHask.Prelude |
| orElse | NumHask.Prelude |
| orEmpty | NumHask.Prelude |
| otherwise | NumHask.Prelude |
| Overflow | NumHask.Prelude |
| overflowError | NumHask.Prelude |