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In layouts designed for English language users, alphanumeric characters are those comprised of the combined set of the 26 alphabetic characters, A to Z, and the 10 Arabic numerals, 0 to 9. For some computer purposes, such as file naming, alphanumeric characters are strictly limited to the 26 alphabetic characters and 10 numerals. However, for other applications, such as programming, other keyboard symbols are sometimes permitted. The mishmash of letters and numerals used for texting abbreviations is sometimes referred to as alphanumerish. As is the case with the term alphanumeric, alphanumerish can be expanded to include other characters.
Alphanumeric refers to a character set with alphabetic characters A-Z and numerals Other characters also may be included in an alphanumeric character set. Alphanumeric data is useful for storing text and website addresses. For increased security, computer users are encouraged to use alphanumeric characters when setting up passwords, usernames and other identifiers. It is more difficult to break an alphanumeric code than a code of all alphabetic characters or all numbers. Special characters and upper and lower-case alphabetic characters are included, in certain cases. Toggle navigation Menu.
Alphanumeric characters refer to a set of characters consisting of both letters and numbers. Specifically, the alphanumeric set contains 26 Latin letters, A through Z, and 10 Arabic numbers, 0 through 9. Depending on the specific use, alphanumeric character sets may distinguish between upper- and lower-case letters, meaning the number of alphanumeric characters is either 36 -- if case is not considered -- or 62 -- if it is case-sensitive. The alphabetical component of alphanumeric characters consists of the 26 characters of the modern Latin alphabet. This alphabet is used in written English, French, Spanish, Italian and elsewhere, sometimes with special accents and sometimes without. The numerical component of alphanumeric characters consists of the 10 numbers of the modern Arabic numbering system, used throughout the world.