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diff --git a/design_docs/definitions.rst b/design_docs/definitions.rst
index 26671f7..4423d45 100644
--- a/design_docs/definitions.rst
+++ b/design_docs/definitions.rst
@@ -12,3 +12,27 @@ Definitions
 
    * - Event
      - An item of significance to the policy engine, for which the engine has become aware through some method of discovery e.g. polling or notification.
+
+Abbreviations
+=============
+.. list-table:: Abbreviations
+   :widths: 15 85
+   :header-rows: 1
+
+   * - Term
+     - Meaning
+
+   * - CRUD
+     - Create, Read, Update, Delete (database operation types)
+
+   * - FCAPS
+     - Fault, Configuration, Accounting, Performance, Security
+
+   * - NF
+     - Network Function
+	 
+   * - SFC
+     - Service Function Chaining
+
+   * - VNF
+     - Virtual Network Function