Thank you. I understand that those are the (most) common abbreviations/acronyms. But, perhaps due to age related cognitive decline, a 1 of 3 letter difference is less obvious to me. Thus I also use the same abbreviations as dgilligan02 with the exception of “Unlt”/”Unlm”. I find Cash, Pref, Unlm (or Unlim) to be far easier to differentiate than CIC, CIP, CIU.

When writing something where only 1 of the 3 is mentioned, the 3 capital letter abbreviation/acronym may well be more suitable. (Not to mention that my “Point of order clarification” comment was intended to be tongue-in-cheek*, hence the “wink” emoji .)

(* “Tongue-in-cheek: is an idiom that describes a humorous or sarcastic statement expressed in a serious manner.”)