Alphanumericals

A black-headed gull ringed with an alphanumeric plastic ring that makes it easier to read from a distance.

Alphanumeric characters or alphanumerics are characters belonging to the English alphabet or Arabic numerals. It includes both lower and uppercase characters. The complete list of alphanumeric characters in lexicographically 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). Other similarities can include 5 and S, Z and 2.

See also

• Alphanumeric brand names
• Alphanumeric shellcode
• Alphanumeric keyboard
• Binary-to-text encoding
• Mathematical Alphanumeric Symbols
• US-ASCII