[ih] What research capability-based OS was on the ARPAnet?

[Greg Skinner]

I found a document by Jed Donnelley that describes in some detail the Capability Computing research he did.

https://www.computer-history.info/Page4.dir/pages/LTSS.NLTSS.dir/pages/cap-livermore.html <https://www.computer-history.info/Page4.dir/pages/LTSS.NLTSS.dir/pages/cap-livermore.html>

—gregbo

> On Dec 6, 2022, at 12:52 AM, John Gilmore via Internet-history <internet-history at elists.isoc.org> wrote:
> 
> When I was a teenager connecting to various computers on the ARPAnet via
> the old Telenet/ARPAnet RS232 patch (about 1975), I used commands like
> "@o 134" to open a connection to the MIT-AI computer, where I had a
> tourist account and learned Emacs.  I used to try "@" other numbers, and
> explore what else was out there; there were only a few hundred machines,
> and most wouldn't let you get past a login prompt.
> 
> For a time, I ran across an interesting research machine that was based
> on "capabilities".  It was well documented for its time, and I learned
> about it by using it just to explore, but I never programmed for it.  By
> now I've forgotten its name and who its inventor was.  Do any Internet
> historians remember it?
> 
> 	John
> 	
> PS:  I may have been using an acoustic coupler at the time, in a
> 300 bps modem connection to a Telenet front-end.  Wow.  Things have
> evolved since 1975.
> 
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