  This paper presents a novel method that allows to generalise the use of the
Adam-Bashforth to Partial Differential Equations with local and non local
operator. The Method derives a two step Adam-Bashforth numerical scheme in
Laplace space and the solution is taken back into the real space via inverse
Laplace transform. The method yields a powerful numerical algorithm for
fractional order derivative where the usually very difficult to manage
summation in the numerical scheme disappears. Error Analysis of the method is
also presented. Applications of the method and numerical simulations are
presented on a wave-equation like, and on a fractional order diffusion
equation.
