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    <p>I found the following on<a moz-do-not-send="true"

href="https://en.wikipedia.org/wiki/Message_broker#/media/File:Message_Broker.png">

        Wikipedia</a> this morning.  The whole article is <a

        moz-do-not-send="true"

        href="https://en.wikipedia.org/wiki/Message_broker">here</a>. 

      If we use David's labels (substitute Adapter for Proxy, for

      example), I think the two are equivalent, <br>

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    <p>Terry<br>

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