Self
Self is an object-oriented programming language based on the concept of prototypes. It was used primarily as an experimental test system for language design in the 1980s and 1990s; however, as of July of 2006, Self is still being actively developed as part of the Klein project which is a Self virtual machine written entirely in Self. The latest major version is 4.3, which was released in July 2006.
Citations
Programming Language
This is a programming language. It may be used to instruct computers to accomplish a variety of tasks which may or may not be domain-specific.