Alphanumeric means "containing both numbers and letters". The term was created in the 1950s by combining the words alphabet and numerical.

Alphanumeric code consists of characters that represent both the letter of the alphabet and the digits 0 to 9. However, in some usages, alphanumeric characters can contain various symbols, including punctuation marks and the signs for mathematical operations.
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Allowance Alpha test Alphanumeric Alt Gr key Alt key