  This report, prepared for the Community Planning Study - Snowmass 2013 -
summarizes the theoretical motivations and the experimental efforts to search
for baryon number violation, focussing on nucleon decay and neutron-antineutron
oscillations. Present and future nucleon decay search experiments using large
underground detectors, as well as planned neutron-antineutron oscillation
search experiments with free neutron beams are highlighted.
