diff --git a/Glossary-of-Terms.md b/Glossary-of-Terms.md
index 279d179..32925e4 100644
--- a/Glossary-of-Terms.md
+++ b/Glossary-of-Terms.md
@@ -1,3 +1,12 @@
+**Assembly**
+ An assembly is a file that is automatically generated by the compiler upon successful compilation of every . NET application. It can be either a Dynamic Link Library or an executable file. It is generated only once for an application and upon each subsequent compilation the assembly gets updated.
+
+**Device**
+A base class, defined in the PepperDash.Core library (`PepperDash.Core.Device`).  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.
+
+**DeviceManager**
+A static class (`PepperDash.Core.Essentials.DeviceManager`) that contains an unordered collection of Devices.  Devices are added/registered to the DeviceManager and later can be retrieved as references by Key.
+
 **Essentials Application**
 A Crestron SIMPL# Pro application that is made up of the Essentials Framework and any optionally any number of Essentials Plugins
 
@@ -7,15 +16,8 @@ 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
 
-**PepperDash.Core**
-A SIMPL# utility library referenced by Essentials Framework.  
-
-**Assembly**
- An assembly is a file that is automatically generated by the compiler upon successful compilation of every . NET application. It can be either a Dynamic Link Library or an executable file. It is generated only once for an application and upon each subsequent compilation the assembly gets updated.
-
-**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.
-
 **IKeyed**
 An important interface defined in PepperDash.Core that requires a string property named Key, whose value must be unique.
 
+**PepperDash.Core**
+A SIMPL# utility library referenced by Essentials Framework.  
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