Are used to display reserved characters in HTML.
Entity names are case sensitive.
//a character entity looks like this: &entity_name; //or &#entity_number;
Combining Diacritical Marks
A diacritical mark is a "glyph" added to a letter.
Diacritical marks can be used in combination with alphanumeric characters to produce a character that is not present in the character set (encoding) used in the page.