S-Expressions


 * http://cairnarvon.rotahall.org/misc/sexpcode.html
 * http://cairnarvon.rotahall.org/misc/sexpcode_test.php
 * http://cairnarvon.rotahall.org/2010/05/25/towards-a-better-bbcode/


 * http://s-expressions.com/
 * http://people.csail.mit.edu/rivest/sexp.html