>Paul Koning wrote:

On Mar 9, 2016, at 1:54 PM, Chuck Guzis <ccl...@sydex.com> wrote:
...
I suspect that the nuclear power industry is one place that you'll find the 
oldest stuff, however, given the long regulatory approval process for change.

I remember a nuclear reactor (research, not power generation) controlled by a 
PDP-9.

For Ontario Power Generation (formerly Ontario Hydro), the Nuclear Power Generation station at Darlington (just East of Toronto) still uses the PDP-11 running RSX-11. A refurbishment is either in progress of will commence soon and that might change, but it is unlikely. It is easier to continue to use the original hardware and software than to completely revamp the system. In the past, only the servicing hardware tends to
change.

Jerome Fine

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