This book is aimed at readers who want to develop application programs with two-dimensional graphics based on the GKS standard. GKS has significantly influenced later graphics standards and remains relevant as a two-dimensional programming interface. Many graphical application programs owe their longevity and portability to GKS. They were often developed on specialized graphics terminals and now run—thanks to updated GKS implementations—on workstations and X-terminals. The second edition has been completely revised. In addition to the FORTRAN language binding, a C language binding has been included. The years of experience gained from the interplay of new GKS application programs and the further development of the GKS implementation "newGKS" make this book a current practical guide.