The group's principal activities are to design, develop, license and market high-speed chip-connection technologies to enhance the performance and cost-effectiveness of computers, consumer electronics, communications systems and networking products. the group has multiple chip-connection technologies. this is used in dynamic random access memory (dram) devices and memory controller ics that connect to dram devices. the group's patents and intellectual property are also used in sdram-compatible memory devices and ddr-compatible memory devices. the group's newest chip-connection technology, yellowstone, with high-speed data transfer rates, enables solutions satisfying various high-bandwidth market requirements. the group sells its technology to customers in the far east, north america and europe. royalties accounted for 81% of fiscal 2001 revenues and contract revenues, 19%.