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+**Essentials Application**
+A Crestron SIMPL# Pro application that is made up of the Essentials Framework and any optionally any number of Essentials Plugins
+
+**Essentials Framework**
+The collection of core libraries that make up the framework
+
+**Essentials Plugins**
+SIMPL# Pro libraries that reference the Essentials Framework and are loaded at runtime to add or extend functionality
+
+**Device**
+A base class, defined in the PepperDash.Core library.  It can represent a physical device, or a virtual device or behaviour.  Generally, most new classes defined in the Essentials ecosystem should derive from Device.
+
+
+