  Toric Duality arises as an ambiguity in computing the quiver gauge theory
living on a D3-brane which probes a toric singularity. It is reviewed how, in
simple cases Toric Duality is Seiberg Duality. The set of all Seiberg Dualities
on a single node in the quiver forms a group which is contained in a larger
group given by a set of Picard-Lefschetz transformations. This leads to
elements in the group (sometimes called fractional Seiberg Duals) which are not
Seiberg Duality on a single node, thus providing a new set of gauge theories
which flow to the same universality class in the Infra Red.
