As in the rest of this series "devoted to helping the reader obtain general information about a wide variety of topics in [a broadly defined] chemical physics," the editors sought comprehensive analysis of each individual subject, while encouraging the expression of individual points of view. In this volume, they present six papers covering the following topics: polyelectrolyte dynamics, hydrodynamics and slip at the liquids-solid interface, the structure of ionic liquids and ionic liquid compounds, chemical reactions at very high pressure, classical description of nonadiabatic quantum dynamics, and non-Born-Oppenheimer variational calculations of atoms and molecules with explicitly correlated Gaussian basis functions.