If you need an easier way to search the Haskell APIs, use Hoogle: http://haskell.org/hoogle/?q=sort You can even search by type signature. BTW, the sort function is part of the Prelude List libraries, if you want to see one possible implementation: http://haskell.org/onlinereport/list.html Jared. -- http://www.updike.org/~jared/ reverse ")-:"