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While computers speed up these tools, all that is necessary is pencil and paper. We hope these tools may be useful in worlds as different as academic medical centers and pre-literate tribal societies. \emph{Literacy Bridge} a clever and effective program produces changes in maternal and child health and agriculture by supporting communication with spoken word devices.  \subsection{Complexity}  Complex systems have multiple parts and humans, constantly interacting and changing over time. I stumbled upon this example on the internet. We could consider the magnets as non-human parts of the system, marbles as humans, and sticks and pieces of wood as designed control factors to keep the components in a safe range. We can see there are many ways things can go wrong and how hard it is to modify one part without unexpected results elsewhere. \marginnote{Marbles and Magnets \url{ http://tinyurl.com/zqt7jc8}}  \end{section}  \pagebreak