Discussion of the challenges in developing a multi-function colour graphics interface for the British Telecom Long Range Strategic Planning Model during the early 1980s. This cybernetic style model was based upon the principles of System Dynamics. The touch-pad user interface allowed the user to configure up to 400 business input variables, whilst the model projected 120 output indices for Telecommunications Services Demand, Tariffs, Staff, Technology, & Financial Performance. The paper was published in the State of the Art Report on Business Graphics. This SlideShare includes some photos of the terminal interface, graphical output and some of the management principles and philosophy.