  Linear systems under the influence of nonlinear and random linear
perturbations, and with random initial and boundary conditions, are discussed.
The notion of states of a system is substituted by the notion of the generating
vectors for n-point information (n-pi), n=0,1,2,..., characterizing a system at
different space-time points. A complete system of equations for physical n-pi
are derived and certain universal expansions are proposed.
