Through the ages a lot of interesting (and some obscure) programming languages have entertained and confused people. At JAOO Aarhus 2008 Guy L. Steele and Richard P. Gabriel gave a presentation about languages and language constructs in a presentation that is a work of art in itself. In the presentation called “50 in 50″ you can see Guy Steele rap about APL and later in the video about spelling keywords backwards. The song about God wrote in Lisp code is also a part of the presentation. Among the languages mentioned are APL, Cobol, AP/I, Scheme, IPL-V, AED, Madcap, Piet, SNOBOL, ADA, Algol60, Intercal, Logo, Perligata, Shakespeare, Lucid, Occam, HQ9+, MUMBLE, Rake, Perl and of course Lisp. (via Art and code - obscure or beautiful code? | JAOO Community Blog)
