Index - O
| o | Turtle.Format, Turtle |
| octDigit | Turtle.Pattern, Turtle |
| once | Turtle.Pattern, Turtle |
| oneOf | Turtle.Pattern, Turtle |
| onFiles | Turtle.Prelude, Turtle |
| ooo | Turtle.Prelude, Turtle |
| oox | Turtle.Prelude, Turtle |
| opt | Turtle.Options, Turtle |
| optDouble | Turtle.Options, Turtle |
| optInt | Turtle.Options, Turtle |
| optInteger | Turtle.Options, Turtle |
| option | Turtle.Pattern, Turtle |
| optional | Turtle |
| options | Turtle.Options, Turtle |
| optLine | Turtle.Options, Turtle |
| optPath | Turtle.Options, Turtle |
| optRead | Turtle.Options, Turtle |
| optText | Turtle.Options, Turtle |
| outhandle | |
| 1 (Function) | Turtle.Prelude, Turtle |
| 2 (Function) | Turtle.Bytes |
| output | |
| 1 (Function) | Turtle.Prelude, Turtle |
| 2 (Function) | Turtle.Bytes |
| owo | Turtle.Prelude, Turtle |
| owx | Turtle.Prelude, Turtle |