Motivated by the recent super-Kamiokande results on atmospheric neutrinos,
we incorporate massive neutrinos, with large angle oscillation between the
second and third generations, in a theory with R-parity violating supersymm
etry. The general features of such a theory are briefly reviewed. We emphas
ize its testability through the observation of comparable numbers of muons
and taus, produced together with the W-boson, in decays of the lightest neu
tralino. A distinctly measurable decay gap is another remarkable feature of
such a scenario.