Discussions at the Space and Astrophysical Plasmas workshop held in Santa Barbara, CA in the summer of 1982 are reviewed. Attention was given mainly to hydromagnetic shocks and particle acceleration, interactions between cold and hot plasmas, and hydromagnetic flows. The structure of collisionless shocks was examined, with attention given to the terrestrial bowshock. Numerical simulations of collisionless shocks were presented, including details of ion dynamics in studies of internal shock structure. Shock acceleration was explored on a basis of a steady-state model showing cosmic rays to diffuse near a high Mach number quasi-parallel shock approximated a discontinuity in the flow speed. Problems needing further study were indicated, e.g., the efficiency of a shock wave, energy transfer between plasmas of differing temperatures, and heat transport in laser-irradiated plasmas.