Standard
A quartal chord, three notes · also A7sus4 (no 5th) · Open strings
Fourths, stacked on the first note in its name
A quartal chord, three notes · also A7sus4 (no 5th) · Open strings
A quartal chord, four notes · also Am7(add11), no 5th · Open position
E quartal chord, four notes · also Em7(add11), no 5th · Open strings
The Empire Strikes Back, 1980 · John Williams · nearest shape for the hand