> > CQFD
> 
> Can I ask Emacs what that means as well?

Should be able to.  May need some more matchin learnin...
> 
> Well, Emacs-w3m, if that counts, tells me it is the French
> counterpart of the Swedish VSB, "vilket skulle bevisas" (or
> the Swedish VSB is the counterpart of the French CQFD, "ce
> qu'il fallait démontrer", if you'd like).
> 
> In English it is in Latin, QED for "quod erat demonstrandum".

Bingo!