  The Beijing Spectrometer (BESIII) collaboration uses $e^+e^-$ collisions in
the tau-charm energy region to study a broad spectrum of topics. These include
studies of light mesons and light baryons, studies of charmonium, including
exotic mesons and baryons containing charmonium, studies of charmed mesons and
baryons, studies of QCD and tau physics, as well as searches for new physics.
The following is a Snowmass white paper that outlines the BESIII
accomplishments and potential in each of these areas.
