One of the longer NASA acronyms is REFSMMAT (REFerence to a Stable Member MATrix)
Ed Pavelka was one of the flight controllers who occupied the FIDO console at mission control. As a way to cement the esprit de corps among the flight dynamics team, he invented a fictional character "Captain REFSMMAT" who represented the idea Flight Controller. A series of posters were drawn, including the captain's arch enemy Victor Vector.
I have a reproduction of one of those posters in a book I'm reading, but I can't see any reproductions of this or other posters in the series on the internet.
Does anyone have a link to any of these posters, as I'm sure they'd be an interesting insight into the personnel at mission control in the Apollo days.
(Screencap from my Kindle - originally in "How Apollo flew to the Moon" by W. David Woods)