Brodlie, K. W.Maguire, M. C.Pfaff, G. E.D.S. Greenaway and E.A. Warman2015-09-292015-09-2919821017-4656https://doi.org/10.2312/eg.19821009The question of how to validate GKS implementations is crucial to the success of GKS as an international standard for computer graphics. This problem has been addressed by a series of certification workshops sponsored by the EEC. A basic strategy for testing GKS implementations is outlined and progress towards the development of a test suite is reported.10.2312/eg.19821009