Observations of young star clusters, super star clusters. Star cluster formation, star formation in clusters, IMF. Observations of Galactic and extragalactic globular clusters. Observations of galactic nuclei and the Galactic center. X-ray sources in dense star clusters, ULXs. N-body simulations of dense star cluster dynamics, codes and hardware. Monte Carlo techniques for N-Body simulations. Binary and single star evolution in dense clusters. Compact object formation and evolution in star clusters. Millisecond radio pulsars and ultracompact X-ray binaries. Gravitational wave sources in dense star clusters and galactic nuclei. Hydrodynamics of stellar collisions and their consequences. Observations and theoretical modeling of blue stragglers. Observational signatures of central massive black holes. Formation of intermediate-mass black holes. Dynamics of star clusters around massive black holes. Stellar captures and tidal disruptions by massive black holes. Planets and brown dwarfs in star clusters.