In the US, Apple Computer Inc accompanied the SE/30 with a new release of A/UX Unix, claiming it simplifies the development process for Unix, Macintosh and X Window system developers. A/UX 1.1 offers X Window as an add-on product and is compliant with the IEEE Posix draft 12 standard and Federal Information Processing Standard. A/UX is a full implementation of System V.2 with BSD 4.3 extensions for the Mac II and IIx. With the new release, programs written for X 11.3 can run under A/UX or use an A/UX Mac as a display workstation, and users can develop distributed applications that split execution and display among the Mac and other X Window computers; it also facilitates development of Mac applications that run under both MacDOS and A/UX. It needs a 4Mb II or IIx with 80Mb disk and paged memory management unit and ships in March 1989. X Window for A/UX is $329; new copies of A/UX 1.1 are $700, upgrades are $400 on tape, $600 on floppy, and the right to update a second system is $100.