Another renumbering, so that all concurrent styles are bundled together

27-free-agents/README.md

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+Style #15
+==============================
+
+Similar to the letterbox style, but where the 'things' have
+independent threads of execution.
+
+Constraints:
+
+- The larger problem is decomposed into 'things' that make sense for
+  the problem domain 
+
+- Each 'thing' has a queue meant for other \textit{things} to place
+messages in it
+
+- Each 'thing' is a capsule of data that exposes only its
+ability to receive messages via the queue
+
+- Each 'thing' has its own thread of execution independent of the
+others.
+
+Possible names:
+
+- Free agents
+- Active letterbox
+- Actors