Fermion Masses in SO(10) Models

SO(10) grand unified theory which unifies strong and electroweak
interactions also provides a constrained and unified description of
the fermion masses and mixing angles. In this talk, I will review many
SO(10) models and will discuss their viability in explaining all the
fermion masses and mixing angles. The supersymmetric and
non-supersymmetric versions of minimal, non-minimal and flavor
symmetric SO(10) models and their consequences on the fermion mass
spectrum will be discussed. Several interesting observations like the
possible origin of differences in the flavour mixing patterns of
quarks and leptons and predictions for the reactor angle and leptonic
CP violating phases will be outlined in each case.