  I summarize here the results of a global fit to the full data set
corresponding to 535 days of data of the Super-Kamiokande experiment as well as
to all other experiments in order to compare the two most likely solutions to
the atmospheric neutrino anomaly in terms of oscillations in the $\nu_\mu \to
\nu_\tau$ and $\nu_\mu \to \nu_s$ channels.
