"An operating system is a collection of things that don't fit into a language. There shouldn't be one." - Daniel H. H. Ingalls; Design Principles Behind Smalltalk; Byte Magazine, August 1981.
"In this way, the underlying metaphor of communicating objects can be seen to operate all the way up to the level which corresponds to a conventional operating system." - Daniel H. H. Ingalls; The Smalltalk-76 Programming System: Design and Implementation; Conference Record, Fifth Annual ACM Symposium on Principles of Programming Languages (POPL), 1978.
Open Source versions: GNU Smalltalk, Pocket Smalltalk, #Smalltalk (sharp-Smalltalk), Squeak, StepTalk, Susie.
Smalltalk's inventors, the famous Alan Kay team from Xerox PARC, are now working on the free implementation Squeak. It is only a download away.
On this page, @links are arranged in three groups and levels: 1) Top group: issues spanning multiple unrelated languages. 2) Middle group: issues specific to one language. 3) Bottom group: specific implementations, with their own directory category.