Competitors A number of plug compatible manufacturers sold competitors to the 2250, including Adage, Evans & Sutherland, Information Displays Inc., Lundy, Sanders, Spectragraphics, and Vector General. Successors In 1977 IBM introduced the 3250 Display System (manufactured by Sanders Associates) as an upgrade to the 2250. See also IBM 740 Tektronix 4014 IBM 3179G Digital Equipment Corporation DEC GT40 References External links IBM System/360 Component Description IBM 2250 Display Unit Model 1 GA27-2701-3. IBM System/360 Component Description IBM 2250 Display Unit Model 2 IBM 2840 Display Control Model 1 GA27-2702-0. IBM System/360 Component Description IBM 2250 Display Unit Model 3 IBM 2840 Display Control Model 2 GA27-2721-0. IBM 1130 Computing System Component Description IBM 2250 Display Unit Model 4 A27-2723-0. IBM 1130/2250 Graphic Subroutine Package For Basic FORTRAN IV C27-6934-0. IBM 2250 Programming Information 2250 2250 Graphical terminals