'Family tree' categorisations like this one follow a traditional 'Vox' pattern, based on historical development (see the DIN/British Standards BS 2961). This scheme combines transitional and modern types together, and has a new category for 20th century roman (serif) types.
gothic or blackletter
types
italic and script
types
old style roman
types
transitional and modern
types
slab serif
types
styles
intro
sans serif
types
titling and display
types
20th century roman
types
