Off topic: The Pop-11 programming language and Poplog environment
This is off topic, but it might interest you anyway.
Some weeks ago I started to more systematically learn the programming language Pop-11 and its environment Poplog. Pop-11 is a great but rather unknown programming language started in the '70s and was used (and is still used) for example in Artificial Intelligence research and education. Poplog also includes implementations of Common Lisp. Prolog and ML.
Today I wrote about Pop-11 and Poplog in The Pop-11 programming language and Poplog environment (at my other blog hakank.blogg, normally a Swedish spoken blog but this entry is in English).