Index - N
| need | Turtle.Prelude, Turtle |
| newline | Turtle.Pattern, Turtle |
| NominalDiffTime | Turtle |
| noneOf | Turtle.Pattern, Turtle |
| nonexecutable | Turtle.Prelude, Turtle |
| nonreadable | Turtle.Prelude, Turtle |
| nonsearchable | Turtle.Prelude, Turtle |
| nonwritable | Turtle.Prelude, Turtle |
| notChar | Turtle.Pattern, Turtle |