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Alphanumeric characters oralphanumerics refers to characters belonging to theEnglish alphabet andArabic numerals. It includes both lower and uppercase characters. The complete list of alphanumeric characters inlexicographically ascending order is:0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.
Different alphanumeric characters have similar appearances, such as I (upper case i), l (lowercase L), and 1 (one), and O (uppercase o), Q (uppercase q) and 0 (zero).[1] Other similarities can include 5 and S, Z and 2.
