With the OpenType-Features you have additional typographic functions/open-type features as ligatures, small caps, tabular lining figures (TLF), proportional lining figures (PLF), old style figures (OSF), superscript (SUPS) as well as stylistic alternates [SALT]. These features will activate alternative glyphs by choosing 'Stylistic Alternates' in Adobe Illustrator and Photoshop, or on the other hand by selecting 'Titling Alternates' or 'Stylistic Set 1' in InDesign.

You can find all additional characters and features on the particular typeface page in Glyph Set.