Ƒ

The letter (minuscule: ƒ) is a letter of the Latin alphabet, based on the italic form of F. It is used in writing the Ewe language to represent a voiceless bilabial fricative (IPA: ), as distinct from the letter F, which represents a voiceless labiodental fricative. Compare , which is the equivalent voiced sound.
The minuscule ƒ is also used as an abbreviation for florin, gulden and guilder.
The lowercase ƒ is also used in mathamatics for funtion notation:
 ƒ(x)=πx2
Use on computers.
Older fonts and character encodings included only the minuscule form for its use as an abbreviation. Unicode includes both the majuscule and the minuscule.