diff --git a/HTML-Notes.md b/HTML-Notes.md
index a60387c..3abffdc 100644
--- a/HTML-Notes.md
+++ b/HTML-Notes.md
@@ -110,3 +110,8 @@ Indicates how the browser should display the link when clicked.
 * `_self` is the default and will open in the same tab or window
 * `_blank` will open in a new tab or window
 
+## Special Characters
+
+### Entities
+
+An ***entity*** is a mechanism for writing special charctyers or symbols in HTML, such as mathematical symbols, characters in most languages, and many other symbols. Many can be specified by name but some must be referred to by decimal or hexadecimal numbers.
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