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+
+Haskell
+==================
+
+Structure
+------------
+Haskell programs consist of monads, actions, modules, ???
+
+Basic Syntax
+---------------
+
+A "type declaration":
+
+ main :: IO ()
+
+An action definition. Note that whitespace matters; the block extends to all
+lines indented to the same position as the first non-whitespace after the
+``do``:
+
+ main = do
+ stuff1
+ stuff2
+
+
+Compilation
+------------
+By default the "main" action of the "Main" module is the action that is
+executed when a compiled haskell program is run by the operating system;
+this means that most haskell programs need to define these components.
+
+The `ghc` (Glasgow Haskell Compiler) is the most popular. To compile and
+execute a simple one file haskell program you will do something like:
+
+ ghc -o hello helloworld.hs
+ ./hello