Uppercase vs. Alphanumeric: What's the Difference?

Of, printed, or formatted in capital letters

Consisting of both letters and numbers.

To put (type or text) in uppercase letters.

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

To begin (a word) with an uppercase letter.

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

Written in upper case; capital

Consisting of these characters plus punctuation and other special characters.

Alternative spelling of upper case

An alphanumeric character.

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

Of or pertaining to alphanumeric characters

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