Preface; Session 1: Classification, Definition and Mathematics of Boundary Layers: Prandtl's Concept and the Work in Göttingen, by G.E.A. Meier; The Full Lifespan of the Boundary-Layer and Mixing-Length Concepts, by P.R. Spalart; Rational Basis of the Interactive Boundary Layer Theory, by J. Cousteix, J. Mauss; Symmetry Methods in Turbulent Boundary Layer Theory, by M. Oberlack, G. Khujadze; Viscous/Inviscid Interaction Procedures for Compressible Aerodynamic Flow Simulations, by M. Hafez, E. Wahba; Session 2: Instability of Boundary Layers and Transition: The Application of Optimal Control to Boundary Layer Flow, by D. Henningson, A. Hanifi; Leading-Edge Boundary Layer Flow (Prandtl's Vision, Current Developments and Future Perspectives), by V. Theofilis, A. Fedorov, S.S. Collis; Application of Transient Growth Theory to Bypass Transition, by E. Reshotko, A. Tumin; Routes of Boundary-Layer Transition, by Y.S. Kachanov; Instabilities in Boundary-Layer Flows and their Role in Engineering, by J.D. Crouch; In-Flight Investigations of Tollmien-Schlichting Waves, by A. Seitz, K.-H. Horstmann; The Influence of Roughness on Boundary Layer Stability, by M. Gaster; Boundary-Layer Instabilities in Transonic Range of Velocities, with Emphasis on Upstream Advancing Wave Packets, by O.S. Ryzhov, E.V. Bogdanova-Ryzhova; Laminar-Turbulent-Laminar Transition Cycles, by R. Narasimha; Session 3: Boundary Layers Control: A Century of Active Control of Boundary Layer Separation: A Personal View, by I. J. Wygnanski; Boundary Layer Separation Control by Manipulation of Shear Layer Reattachment, by P.R. Viswanath; Stability, Transition, and Control of Three-Dimensional Boundary Layers on Swept Wings, by W. Saric, H. Reed; Transition to Turbulence in 3-D Boundary Layers on a Rotating Disk (- Triad Resonance), by T. Corke, E.H. Matlis; Control and Identification of TurbulentBoundary Layer Separation, by A. Seifert, L. Pack-Melton; Session 4: Turbulent Boundary Layers: The Near-Wall Structures of Turbulent Boundary Layer, by J. Jimenez, G. Kawahara; Turbulence in Supersonic and Hypersonic Boundary Layers, by A.J. Smits, M.P. Martin; The Role of Skin-Friction Measurements in Boundary Layers with Variable Pressure Gradients, by H.-H. Fernholz; The Mean Velocity Distribution near the Peak of the Reynolds Shear Stress, Extending also to the Buffer Region, by K.R. Sreenivasan, A. Bershadskii; Session 5: Numerical Treatment and Boundary Layer Modelling: Turbulence Modelling for Boundary-Layer Calculations, by W. Rodi; Instability and Transition in Boundary Layers: Direct Numerical Simulations, by H. F. Fasel; Revisiting the Turbulent Scale Equation, by F. R. Menter, Y. Egorov; Industrial and Biomedical Applications, by F.T. Smith, N. Ovenden, R. Purvis; Analysis and Control of Boundary Layers: A Linear System Perspective, by J. Kim, J. Lim; The Development (and Suppression) of very Short-Scale Instabilities in Mixed Forced-Free Convection Boundary Layers, by P.W. Duck, J.P. Denier, J. Li; Computational Studies of Boundary-Layer Disturbance Development, by Chr. Davies; Session 6: Special Effects in Boundary Layers: Hypersonic Real-Gas Effects on Transition, by H.G. Hornung; Stabilization of Hypersonic Boundary Layer by Microstructural Porous Coating, by A.A. Maslow; The Asymptotic Structure of High-Reynolds Number Boundary Layers, by P.A. Monkewitz, H.M. Nagib; Instabilities near the Attachment-Line of a Swept Wing in Compressible Flow, by J. Sesterhenn, R. Friedrich; Structure Formation in Marginally Separated Aerodynamic and Related Boundary Layer Flows, by A. Kluwick, St. Braun; High Reynolds Number Turbulent Boundary Layers Subjected to Various Pressure-Gradient Conditions, by H. M. Nagib, Chr. Christophorou, P. A. Monkewitz;