In this volume, recent results are reported on the analysis of fluctuations and correlations in all types of high energy reactions, from lepton-lepton to nucleus-nucleus collisions. The contributions range from theoretical analysis of QCD cascades and branching processes including a prediction of a helix structure of QCD strings to the analysis of Bose-Einstein correlation data in the NA22, NA44, NA49, WA93 and WA98 experiments at CERN SPS, allowing for the first time a complete reconstruction of the longitudinally expanding tubelike particle sources in these reactions. The nature and origin...