Abstract
A programming aid for Fortran model building is described. This is a system of subroutines for storage management and transfer of control. It provides a mechanism for dynamic storage allocation at run time and for specifying various models and modelling processes to be carried out by user subroutines as variable input data to the single controlling program. This program system is written in Fortran iv, and has been run successfully on both IBM and ICL computers. (Author/publisher)