Of course, the best online Coin Collecting/Numismatic glossary is the
CCF Glossary.

(Very helpful!)
Oh, CCF = Coin Community Family, i.e., this forum that you are visiting right now,
http://www.CoinCommunity.com (I am trying to practice what I preach and define acronyms in my posts.)
I should therefore add that
i.e.= Latin abbreviation for
id est (that is).
And there's a good one on Red-It (a site whose name and URL is blocked here) in the
r/coins sub-red-it. Search for "coin terms definitions abbreviations and acronyms".
TAFN!
YHS,
dd27 AKA Mark
YFNWG ;^)
.
.
.

You saw what I did there, eh?

TAFN! = That's All For Now!
YHS = Your Humble Servant, a common
valediction in past centuries.
AKA = Also Known As
YFNWG = Your Friendly Neighborhood Word Geek