Alan Kay recounted the history of Smalltalk for the History of Programming Languages conference, HOPL-II - Cambridge, MA - 20-23 April 1993. worrydream 
In 1978, the first History of Programming Language Conference described the development of 13 computer programming languages, the people who participated in that work, and the context in which it was undertaken. In 1993, HOPL-II contained 14 papers on the genesis and evolution of programming languages. In 2007, HOPL-III was held in conjunction with Federated Computing Research Conference in San Diego. site
The Power Of The Context.
Remarks upon being awarded — with Bob Taylor, Butler Lampson and Chuck Thacker —
the Charles Stark Draper Prize of the National Academy of Engineering, February 24, 2004. pdf