The observable phenomena in liquids ",hich distinguishes this state of matter from other types of condensed matter can be mainly assigned to a) the configurational disorder and b) the random motion of molecules. Both, the static and the dynamic aspect of randomness are typical for the liquid state and serve as a useful guideline in the attempts to theoretically understand this state. These two basic features, however, introduce in liquid state theory a number of apparently unsurmountable technical and conceptual problems so that progress in the last decades has only been made by small steps. In order not to complicate the situation even more, the tacit assumption was made that we could neglect internal motions of the molecules and that the molecular interactions which had to be taken into account are as simple as possible. We thus became accustomed to visualize molecules in the liquid as a dense assembly of classical rigid particles interacting with a potential which basically is represented by a Lennard-Jones type relation. In the last decade, it has become obvious that with these restrictions we dis­ regard many interesting effects in those liquids which are the most important ones. We thus see a serious gap developing between the refinements of liquid state theory and the exciting experiments being carried out in many laboratories.

Interaction Induced Absorption in Simple to Complex Liquids.- Isotropic Raman Study of Pre-Reactive, Reactive and Post-Reactive Processes in Liquids.- Structures and Energetics of Ion-Solvent Microclusters (n = 1,..,8); Cl?, Br? and I? with H2O, CH3OH, CH3 CN and (CH3)2CO.- Infrared, Far-Infrared and Raman Investigations of the Molecular Dynamics and Interactions of Non-Rigid Molecules in Liquids.- Relative Motion of Pairs of Molecules in Dense Fluids.- Rotational Diffusion Theory of Nuclear Magnetic Spin- Rotational Relaxation.- Models of Conformational Dynamics.- Dielectric Polarization of Fluids Comprising Rigid Dipoles and Molecules with Internal Rotational Degrees of Freedom.- Dynamic Properties of Short Styrene Chains is Bulk Modelled by Computer Simulation.- Dynamics of Dense Polymer Systems. Dynamic Monte Carlo Simulation Results and Analytic Theory.- Anomalous Diffusion of Polymers in Disordered Media.- Optical Anisotropy of Macromolecular Systems by Depolarized Rayleigh Scattering.- Application of Photon Correlation Spectroscopy to the Study of Diffusional Dynamics in Compatible Polymer Blends.- Dynamics of DNA Double Helices.- Frequency Spectrum of F-Actin and F-Actin/Filamin Complexes as Studied by Photon Correlation Spectroscopy.- Electron Spin Resonance Studies of Reorientational Dynamics in Lipid Systems.- Electrostatic Interactions in Surfactant Solution.- Structure and Dynamics of Branched (Epoxy) Polymers and Kinetics of its Polymerization Process.- Light Scattering Study of Epoxy Resin Polymerization.- The Hydrated Electron and the Few-Step Random Walk.- Femtosecond Laser Spectroscopy and Dynamics in Dense Media.- Electrophoretic Light Scattering Revisited: The Role of Electro-Osmosis.