Before I got hooked on UNIX in 1977, I used a Univac Exec8 system.
You “cataloged” (created) a file with the @CAT command.
Other, file operations were done by the File Utility Routine/Program
Utility Routine: FURPUR
(sort of like pip on steroids).
I decided that if I ever got a CAT, it would be named FURPUR. That
happened when I was working for Rutgers. Not having any UNIVACs
around, the name escaped notice until the EE department hired a guy from
the University of Maryland who says “You have a cat named FURPUR?”