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Documentation/TERMINOLOGY

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+_Function_: A _function_ is the smallest unit of a program in Fission.
+It's a program with an function as an entry point -- it doesn't have
+to be just one function.
+
+_Trigger_: Triggers are what cause functions to be called.  For
+example the HTTP trigger causes functions to be called on HTTP
+requests.
+
+_Instance_: Fission creates and runs servers containing these
+functions.  The running server is called an _instance_.  You normally
+don't need to worry about instances: their management is completely
+automatic and transparent to you.  However, certain configuration
+settings allow you to tweak the behaviour of instances -- for example,
+you can configure the strategy for destroying unused instances.
+
+_Generic Instance_: An instance with no user code in it.  The process
+of including the user code to a Generic Instance is _Specialization_,
+and the resulting instance is a _Specialized Instance_.
+
+_Specialized Instance_: See _General Instance_.
+