Silicon Graphics Inc’s MIPS Computer Systems Inc RISC-based Iris 4D three-dimensional workstations with their proprietary graphics processors have already been given the IBM accolade the top-end RS/6000 uses the Mountain View company’s graphics technology – and now Bull SA has decided that the Iris 4Ds are the best in their class. The company has given Silicon Graphics an OEM order for 4Ds – value undisclosed – and will add them to its Design & Engineering computer-integrated manufacturing family.