Also see:
All Major Chords
All Minor Chords
All Dominant Chords
Barre Chords and Barre Chord Extensions
A string set is defined by - which string the root note (bottom note) is on. There are 3 string sets:
Chords with root on 6th string (Low E).
Chords with root on 5th string (A).
Chords with root on 4th string (D)


