Editing HAppS tutorial (section)

=== Application ===
Incoming events are gathered in individual haskell threads and then pushed onto a single application queue for processing. The queue model gives you ACID Atomicity and Isolation and lets your app be simply a set of functions with types like:

<haskell>SomeInputType -> MACID SomeOutputType</haskell>
      	

The MACID monad lets you update your state and *schedule* side-effects. To be clear, MACID is not in the IO monad so you cannot execute side effects, you can only schedule them. The framework takes care of making sure they are executed at-least-once (if they can be completed by a deadline you specify).