| tail | Control.Category.Hask, Control.Category.Constrained.Prelude |
| take | Control.Category.Hask, Control.Category.Constrained.Prelude |
| takeWhile | Control.Category.Hask, Control.Category.Constrained.Prelude |
| tan | Control.Category.Hask, Control.Category.Constrained.Prelude |
| tanh | Control.Category.Hask, Control.Category.Constrained.Prelude |
| Terminal | Control.Category.Constrained.Reified.PolyPattern |
| terminal | Control.Arrow.Constrained |
| toEnum | Control.Category.Hask, Control.Category.Constrained.Prelude |
| toInteger | Control.Category.Hask, Control.Category.Constrained.Prelude |
| toRational | Control.Category.Hask, Control.Category.Constrained.Prelude |
| Traversable | |
| 1 (Type/Class) | Control.Category.Hask |
| 2 (Type/Class) | Data.Traversable.Constrained |
| TraversalObject | Data.Traversable.Constrained |
| traverse | |
| 1 (Function) | Control.Category.Hask |
| 2 (Function) | Data.Traversable.Constrained |
| traverse_ | Data.Foldable.Constrained |
| True | Control.Category.Hask, Control.Category.Constrained.Prelude |
| truncate | Control.Category.Hask, Control.Category.Constrained.Prelude |