I worked as a tech author on the release notes for the last shipped release of Xenix, SCO Xenix 2.3.4, in late 1991. The Microsoft legacy lingered in SCO's cod

I worked as a tech author on the release notes for the last shipped release of Xenix, SCO Xenix 2.3.4, in late 1991. The Microsoft legacy lingered in SCO's codebase for a long time -- the MS C compiler was standard right through Open Server (disclaimer: I left in 1995 and happily never had to use that festering dungheap ever again, much less write and maintain chunks of the docset for it).