On Mon, Mar 6, 2017 at 8:21 AM Dan Cross <crossd@gmail.com> wrote:

I once heard that some version of AIX was actually implemented in PL/I. I strongly doubted that, and no one's mentioned it so I assume that's apocryphal? It would be so distinctive that I can't imagine someone NOT mentioning it if it were the case.

I spent about 6 years working with IBM and U. Penn on AIX and nothing of that was ever mentioned by anyone. It sounds like a myth.