Alphanumeric Characters
From AgileApps Support Wiki
Alphanumeric characters are defined as any letter or number in the range of A-Z, a-z and 0-9:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
a b c d e f g h i j k l m n o p q r s t u v w x y z
0 1 2 3 4 5 6 7 8 9