Neutrino Oscillations

The history, present and future of neutrino oscillations is outlined.

The most important solar, atmospheric, reactor and accelerator neutrino oscillation experiments are presented. A connection of neutrino oscillations with neutrino masses and mixing is established. It is stressed that the neutrino oscillations prove the existence of phenomena beyond the Standard model of electroweak interactions. The neutrino mass pattern is discussed in the context of the smallest mixing angle (theta13) and CP-violating phases. The importance of neutrino oscillation experiments for our understanding of universe and its evolution, astrophysical processes and unification of all fundamental interactions is maintained.