For the example to be properly asynchronous one would like to see it be asynchronous all the way up to a single operation, namely some form of message loop.

That is to say, they're taught as messages, in Guillory's view, whatever form of message it might be. The Western Canon has a message about the importance of being an American.

For service clients on other platforms, we had to provide an alternative definition of the interface, which was in the form of documentation of underlying message formats.