> There was a lot of BSD in the core of every proprietary Unix, each tied to a given manufacturer
Except MacOS X, the major proprietary Unixes all predated permissively-licensed releases of BSD, and the early permissively licensed releases were under a copyright cloud for years that prevented anyone from relying on them for commercial downstream distributions.
Except MacOS X, the major proprietary Unixes all predated permissively-licensed releases of BSD, and the early permissively licensed releases were under a copyright cloud for years that prevented anyone from relying on them for commercial downstream distributions.