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:

kaf כ, mem מ, nun נ, pe פ, and tsadi צ

have the final forms

kaf ך, mem ם, nun ן, pe ף, and tsadi ץ

Some languages that use final form characters are:

• Arabic
  Arabic language
  Arabic is a name applied to the descendants of the Classical Arabic language of the 6th century AD, used most prominently in the Quran, the Islamic Holy Book...
  
  
• Hebrew
  Hebrew language
  Hebrew is a Semitic language of the Afroasiatic language family. Culturally, is it considered by Jews and other religious groups as the language of the Jewish people, though other Jewish languages had originated among diaspora Jews, and the Hebrew language is also used by non-Jewish groups, such...
  
  
• Manchu
  Manchu language
  Manchu is a Tungusic endangered language spoken in Northeast China; it used to be the language of the Manchu, though now most Manchus speak Mandarin Chinese and there are fewer than 70 native speakers of Manchu out of a total of nearly 10 million ethnic Manchus...
  
  
• Greek
  Greek language
  Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
  
  

The lowercase Latin

Latin alphabet

The Latin alphabet, also called the Roman alphabet, is the most recognized alphabet used in the world today. It evolved from a western variety of the Greek alphabet called the Cumaean alphabet, which was adopted and modified by the Etruscans who ruled early Rome...

 letter "s" had separate medial (ſ

Long s

The long, medial or descending s is a form of the minuscule letter s formerly used where s occurred in the middle or at the beginning of a word, for example "ſinfulneſs" . The modern letterform was called the terminal, round, or short s.-History:The long s is derived from the old Roman cursive...

) 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

Fraktur

Fraktur is a calligraphic hand and any of several blackletter typefaces derived from this hand. The word derives from the past participle fractus of Latin frangere...

script until the 1940s.