Review Articles -- Physical Properties of Prestellar Cores -- Impulsively Triggered Star Formation -- Starless Cores -- Chemical Processes in Star Forming Regions -- Protostellar Jets: A High Angular Resolution Perspective -- Non-Isothermal Gravoturbulent Fragmentation -- The Birth of Massive Stars and Star Clusters -- Precursors of UchII Regions and the Evolution of Massive Outflows -- Observa…