Use lower case for all symbols (Erlang "atoms"). Consistently using lower case makes searching for symbol names easier and is more readable.
Place hyphens between all the words in a symbol. If you can't easily say an identifier out loud, it is probably badly named.
. unless you have a well-documented overarching reason to, and approval from other hackers who review your proposal.
(defun *default-username* ()"Ann") (defun *max-widget-cnt* () 200)
(defun *default-user-name* () "Ann") (defun *maximum-widget-count* () 200)
Unless the scope of a variable is very small, do not use overly short names like