  Seven new 3D modes of self-organization in DC glow discharges are computed in
the framework of the simplest self-consistent model of glow discharge. Some of
the modes branch off from and rejoin the 1D mode, while others bifurcate from a
2D or a 3D mode. The patterns associated with computed 3D modes are similar to
patterns observed in the experiment. The computed transition from a spot
pattern comprising five spots into a pattern comprising a ring spot also was
observed in the experiment.
