This language also inspired LambdaMOO (created by another Xerox Parc employee) which is another early example of a prototype based language, with its own built

This language also inspired LambdaMOO (created by another Xerox Parc employee) which is another early example of a prototype based language, with its own built in environment, but it's all text based. I'd heard about self in a talk, but hadn't read the docs until now. Super cool reading about it now. Good slice of history.