Microsoft Corp has confirmed that there is an effort under way between IBM and itself to do an implementation of the OS/2 operating system for reduced instruction set processors, including, but not confined to, Intel Corp’s new 80860 as the N 10 is now called. It is likely that IBM will one day offer a version of OS/2 for the RISC-based RT, but with comprehensive alternatives to everything that OS/2 offers coming on apace in the Unix world, it looks increasingly likely that OS/2’s attractions will largely be confined to mainstream IBM mainframe and mid-range users who adopt IBM’s strategy of making PS/2 the future primary terminal for use with its 370-type machines and AS/400s.