Substitutes a special form of a letter occurring at the end of a word. (Common in Latin connecting scripts, and required in various non-Latin scripts like Arabic)
Replaces character with subscript version.
Small Capitals From Capitals
Turns caps (and sometimes also numerals and punctuation) into small caps. Mostly used together with Small Capitals feature to get an all-small caps setting.
Replaces characters with ordinal forms for use after figures.