> From: Alan Kay <Alan.Kay at disney.com>

> Rosetta Smalltalk came up with a different way to do a cleaner  
class interface.
[and earlier]
> This was an excellent "redesign" and implementation of  
Smalltalk-72. I.e.
> instead of being slavish to what we had done at PARC and making a  
literal
> copy, they came up with a very interesting set of improvements to  
ST-72,
> most of which really helped the end user. The Exidy (Z80) wasn't  
up to the
> bitmap graphics that the Alto could do, but nonetheless, this  
system was
> fun to contemplate ... There were several papers written by these  
folks ...

I've tried tracking down the references, but it seems to be  
difficult in this part of the woods.  Could you explain just a little  
what those interesting improvements to ST-72 were (presumably to do  
with the cleaner class interface)?

Thanks,

Marcel