<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br>A simple and unifying approach to subjective objects. R B Smith, D Ungar,Theory and Practice of Object Systems, Citeseer, 1996.</div><div><a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.56.7535">http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.56.7535</a></div><div><a href="http://portal.acm.org/citation.cfm?id=246311">http://portal.acm.org/citation.cfm?id=246311</a></div><div><br></div><div>for those who have access. As its not my paper I'll let Dave say if a version is freely available.</div><div><br></div><div>As far as I know the system was only ever a demo. I doubt it could be implemented efficiently on the current vm without baking the lookup algorythm changes into it though I'd love to be proved wrong.</div><div><br></div><div>I would recommend interested people also look into Brian Rice's Slate language and the Classbox stuff in Smalltalk as well.</div><div><br></div><div>-Russell</div><br><div><div>On 12/01/2011, at 2:12 PM, Josh Flowers wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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<div id="ygrp-text"><p>> Can you give 'us' a url, again. 'us' is very difficult to google. <br>
> <br>
> Thanks!<br>
> David<br>
> <br>
<br>
This one appears to be easier asked than answered. I've been looking <br>
for the better part of an hour and the closest I've come is a post by <br>
Jecel to this mailing list... complaining that the paper has been lost <br>
to the mess of the internet:<br>
<br>
<a href="http://tech.groups.yahoo.com/group/self-interest/message/1867">http://tech.groups.yahoo.com/group/self-interest/message/1867</a><br>
<br>
Hopefully someone has a copy handy, or this list has better finders <br>
than me.<br>
<br>
The little bit I have found reads that Us was an attempt to build a <br>
Self system where object behavior could change based on the<br>
sender of a message. I've always wondered how that might look and<br>
feel - was there ever an implementation of Us? Or did it only make<br>
it to the 'good idea looking for a grant' stage?<br>
<br>
Josh<br>
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