Uppercase vs. Alphanumeric — What's the Difference?

Of, printed, or formatted in capital letters

Alphanumericals are a combination of alphabetical and numerical characters, and is used to describe the collection of Latin letters and Arabic digits or a text constructed from this collection. Merriam-Webster suggests that the term "alphanumeric" may often additionally refer to other symbols, such as punctuation and mathematical symbols.In the POSIX/C locale, there are either 36 (A-Z and 0-9, case insensitive) or 62 (A-Z, a-z and 0-9, case-sensitive) alphanumeric characters.

To put (type or text) in uppercase letters.

Consisting of both letters and numbers.

To begin (a word) with an uppercase letter.

Consisting of or using letters, numbers, punctuation marks, and mathematical and other conventional symbols

Written in upper case; capital

Consisting of, or limited to, letters and/or numbers, especially the characters A to Z (lowercase and uppercase) and 0 to 9.

Alternative spelling of upper case

Consisting of these characters plus punctuation and other special characters.

(transitive) To convert (text) to upper case.

An alphanumeric character.

Relating to capital letters which were kept in the top half of a compositor's type case;

Of or pertaining to alphanumeric characters