Smalltalk is an object-oriented programming language developed by Alan Kay, Dan Ingalls, Adel Goldberg, Ted Kaehler, Scott Wallace, and others during the 1970s, influenced by Lisp, Logo,Sketchpad and Simula. It has influenced the design of many languages especially Objective C, and Ruby.
There are many versions of Smalltalkavailable. For this book we are going to useSqueak. First download a version of Squeak appropriate for your platform.