Galactic and anomalous cosmic rays in the heliosphere

We discuss the present status of our understanding of the transport and acc eleration of anomalous cosmic rays and the transport of galactic and CIR-ac celerated particles in the heliosphere. Currently, two- and three-dimension al numerical codes can accurately model many of the observed phenomena - wi th the major current uncertainties being the values of the parameters such as the diffusion coefficients and the effects of the poorly understood stru cture beyond the termination shock. We illustrate the nature of the phenome na by discussing in detail the response of energetic particles to co-rotati ng interaction regions, the acceleration of singly- and multiply-charged an omalous cosmic rays, and the effects of galactic cosmic rays on the structu re of the solar wind and its termination shock.