C.F.

cf. is an abbreviation for the Latin word confer, meaning "compare" or "consult". It is mainly used in common and statute law contexts as well as in academic writing. Thus "cf." is often used by authors in the text of their article or book to refer to other academic material which may provide auxiliary information or arguments to the understanding of theirs.It is sometimes used (primarily in dictionaries) to imply insight into the preceding word's etymology — that is, to suggest how one term obtained its particular naming convention (perhaps from another phrase). For example, the phrase "Big Whack (cf. Big Bang)" suggests to the reader that the usage of the moniker (self given nickname) Big Whack derives at least its name from the latter.
See more at Wikipedia.org...

fc, football club, place where American football practice and games take place; place where soccer practice and games take place