"Karl's book takes clockless concurrent process to be fundamental(as it is in nature)." - from a review of <i>Computer Science Reconsidered</i>:<p><a href="http://www.amazon.com/Computer-Science-Reconsidered-Invocation-Expression/dp/0471798142/" rel="nofollow">http://www.amazon.com/Computer-Science-Reconsidered-Invocati...</a><p>From the same author:<p><a href="http://www.amazon.com/Logically-Determined-Design-Clockless-Convention/dp/0471684783/" rel="nofollow">http://www.amazon.com/Logically-Determined-Design-Clockless-...</a>