  A survey on the dynamical and thermodynamical properties of plasmas with
strong Coulomb interactions in the quasi-classical density-temperature region
is given. First the basic theoretical concepts describing nonideality are
discussed. The chemical picture is introduced. It is shown that the nonideal
plasma subsystem of the free charges has a rather large quasi-classical regime,
where the quantum effects yield only corrections to the merely classical
dynamics. The plasma of free charges may be described by effective potentials
which incorporate quantum effects in an approximative way. The simplest
effective potentials are only space-dependent, more advanced methods include
momentum-dependent interactions. On the basis of these potentials analytical
results are derived and simulation methods are developed. It is shown that
effective potentials are appropriate for the description of thermodynamical as
well as collective properties.
