> On Sep 17, 2015, at 1:33 PM, Al Kossow <a...@bitsavers.org> wrote:
> 
> On 9/17/15 9:58 AM, Paul Koning wrote:
>> 
>> DtCyber is open source
> 
> but their OS collection is not.
> they're called "controlfreaks" for a reason.

Yes, because they like Control Data products.  

From what I understand, COS is in fact generally available because it's in the 
public domain.  

The other OSs are not; they are distributed by permission of their owners.  At 
the moment, those permissions do not extend to making them available to the 
whole world.  The keepers of the archive of course honor the restrictions 
imposed by the owners.

In that respect, the situation is not significantly different from, say, that 
of VMS.  VMS is released under a hobbyist license, which is available by 
request.  Controlfreaks is a mechanism for making software available on a 
similar basis and is also available by request.

        paul


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