What does the "f" mean after the name of folder
Sometimes, in the classic Mac OS, I can see a little "f" after a folder's name. I really wonder the meaning of that "f".
I made a screenshot in this video Macintosh SE on dial-up Internet - YouTube. There is a little "f" shown after the folder's name "POPmail II". Is there anyone can help?
iBook, Mac OS 9.2.x