Financial modeling on small systems

Users of smaller systems, such as an IBM System/3, can design and implement financial models using a method similar to the top-down approach used on larger systems. There are three approaches depending on the system configuration: card systems, FORTRAN and DASD systems, and non-FORTRAN and DASD systems. The financial modeling systems resulting from these methods utilize approaches (such as top-down) similar to those used on larger systems. Hence, future upward growth to larger systems is facilitated since these approaches may be employed.