Mechanical energy transfer in particle-surface collisions, J.Harris; dynamics of dissociative chemisorption, A.E.Depristo; quantum effects in gas-solid interactions, S.Holloway; the dynamics of hydrogen adsorption and desorption in copper surfaces, B.E.Hayden; kinetics of surface reactions, W.H.Weinberg; thermal desorption kinetics, H.J.Kreuzer and S.H.Payne; electron stimulated desorption and its application to chemical systems, R.D.Ramsier and J.T.Yates Jr.; photochemistry of the adsorbed state, J.C.Polanyi and H.Rieley.