Solutions to the Atmospheric Neutrino Problem

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 atmosferic neutrino experiments in order to compare the most likely solutions to the atmospheric neutrino anomaly in terms of oscillations in the $\nu_\mu \to \nu_e$, $\nu_\mu \to \nu_\tau$, and $\nu_\mu \to \nu_s$ channels.