| abs | Protolude.Base, Protolude |
| absurd | Protolude |
| acos | Protolude.Base, Protolude |
| acosh | Protolude.Base, Protolude |
| addMVarFinalizer | Protolude |
| All | |
| 1 (Data Constructor) | Protolude |
| 2 (Type/Class) | Protolude |
| all | Protolude |
| AllocationLimitExceeded | |
| 1 (Data Constructor) | Protolude |
| 2 (Type/Class) | Protolude |
| allowInterrupt | Protolude |
| Alt | |
| 1 (Data Constructor) | Protolude |
| 2 (Type/Class) | Protolude |
| Alternative | Protolude |
| and | Protolude |
| Any | |
| 1 (Data Constructor) | Protolude |
| 2 (Type/Class) | Protolude |
| any | Protolude |
| Ap | |
| 1 (Data Constructor) | Protolude |
| 2 (Type/Class) | Protolude |
| ap | Protolude.Monad, Protolude |
| appendFile | Protolude |
| AppendMode | Protolude |
| appEndo | Protolude |
| Applicative | Protolude |
| applyN | Protolude |
| ArithException | Protolude |
| ArrayException | Protolude |
| asin | Protolude.Base, Protolude |
| asinh | Protolude.Base, Protolude |
| ask | Protolude |
| asks | Protolude |
| AssertionFailed | |
| 1 (Data Constructor) | Protolude |
| 2 (Type/Class) | Protolude |
| Associativity | Protolude |
| asTypeOf | Protolude.Base, Protolude |
| asum | Protolude |
| Async | Protolude |
| async | Protolude |
| asyncBound | Protolude |
| AsyncException | Protolude |
| asyncExceptionFromException | Protolude |
| asyncExceptionToException | Protolude |
| asyncOn | Protolude |
| asyncThreadId | Protolude |
| atan | Protolude.Base, Protolude |
| atan2 | Protolude.Base, Protolude |
| atanh | Protolude.Base, Protolude |
| atDef | Protolude.Safe, Protolude |
| atMay | Protolude.Safe, Protolude |
| atomically | Protolude |