  In 1998, the Super-Kamiokande announced evidence for the observation of
neutrino oscillations based on measurements of the atmospheric neutrino flux.
This paper presents the updated results for fully and partially-contained
events with 736 days of data, as well as upward-going muon results and a global
analysis. Preliminary interpretations of the results in terms of various
two-flavor oscillation hypotheses are presented.
