Nixdorf Computer AG, which already buys Unix processors OEM from Pyramid Technology Inc and MIPS Computer Systems Inc, is to add the forthcoming S2 fault-tolerant three processor MIPS RISC-based system from Tandem Computers Inc to its product line. Nixdorf is making further contributions in all three of its Unix alliances: it is to supply Unix system software to Tandem for the forthcoming machines, and the two are looking at combining their efforts in fault-tolerant Unix systems development using MIPS processors. Pyramid has agreed to buy future systems and system components being developed and manufactured by Nixdorf using the MIPS architecture, and the two are collaborating on operating system, compiler and communications software. And MIPS is also planning to buy system components that the Paderborner’s has developed for its new MIPS-based Targon Unix boxes.