Feedback is starting to come in from independent software vendors that have poked around the Advanced Computing Environment operating systems issue: it seems that moving from Microsoft Corp’s NT to Santa Cruz Operation Inc’s Open Desktop or vice versa will require something like three or four compiles: they are not source codecompatible nor is there any promise that they will be; in addition, the interfaces are different so that in the opinion of one software independent, it’s a matter of completely re-engineering; when compared with what SunSoft is promising, Solaris, which will be source code compatible RISC to Intel Corp iAPX86, seems a more elegant solution.