Arnold, David B.Hall, GillianReynolds, Graham J.2014-10-152014-10-1519851467-8659https://doi.org/10.1111/j.1467-8659.1985.tb00239.xGKS is an international standard for the functional interface to 2D graphics, whilst PHIGS is currently an ISO work item for 2D and 3D graphics. In addition, PHIGS allows improved control over structuring graphics data in the system. With a new work item, the upwards compatability from GKS to PHIGS is being called into question. This paper is an attempt to give direction to these discussions by listing the implications of introducing a software layer between a GKS application program and a PHIGS environment on which this application is to be run. It is intended to highlight differences between the systems and to answer questions such as, "How compatible?", "Is it possible?", "How much does the software layer have to do?", etc.10.1111/j.1467-8659.1985.tb00239.x349-358