In many languages, the final form is a special character used to represent a letter only when it occurs at the end of a word. For example, in Hebrew alphabet the final form is called sofit (Hebrew: סופית, meaning in this case "final" or "ending"). The following Hebrew letters
kaf כ, mem מ, nun נ, pe פ, and tsadi צhave the final forms
kaf sofit ך, mem sofit ם, nun sofit ן, pe sofit ף, and tsadi sofit ץ.Some languages that use final form characters are:
The lowercase Latin letter "s" had separate medial (ſ) and final (s) in the orthographies of many European languages from the medieval period to the early 19th century; it survived in the German Fraktur script until the 1940s.
References
Final form Wikipedia(Text) CC BY-SA