Alan Kay wrote:
The story about Smalltalk-72 is in "The Early History of Smalltalk" that I wrote for ACM's "History of Programming Languages" in 93. I have a pdf file which I'll put on an FTP server somewhere. Also, Dan wrote a truly great paper a few years after Smalltalk-72 about Smalltalk-76, a little of which I included in the "History". However, you should read this as well. I think it was for POPL 78, and there is probably an online copy somewhere ....
http://users.ipa.net/~dwighth/smalltalk/St76/Smalltalk76ProgrammingSystem.ht...