what is alphanumeric

Alphanumeric refers to a combination of letters and numbers in a given language set. In English, alphanumeric characters include the 26 letters from A to Z and the 10 Arabic numerals from 0 to 9. However, for other languages, alphanumeric characters may include letter variations with accents. Sometimes, special characters such as punctuation marks and symbols like @, &, and * are also included. Alphanumeric characters are used in various computer applications such as file naming, programming, and data entry. An alphanumeric password contains numbers, letters, and special characters. Alphanumeric characters are sometimes mistaken for one another, such as the letters I, O, and Q with the numbers 1 and 0. To avoid misinterpretation by humans, various subsets of the alphanumeric were adopted. For example, the DEC Alphabet is a subset of alphanumeric characters that are frequently handwritten, and it avoids the letters I, O, Q, S, and Z.