MIPS Computer Systems Inc is set next Tuesday, February 21, to launch a line of workstation building block products aimed at the OEM market and at system builders looking to get into the RISC market and hoping to take advantage of software binary compatibility with the new DECstation 3100: Sumitomo Corp from Japan will be one of the first customers for the new hardware, which will run X-Window and the Motif user interface endorsed recently by the Open Software Foundation, according to MIPS chairman and chief executive Robert Miller.