Byte-code
   Definition with links to related topics. [FOLDOC, open content]
   http://foldoc.org/foldoc/foldoc.cgi?byte-code

Bytecode
   Growing article, with links to many related topics. [Wikipedia, open content, GNU FDL]
   http://en.wikipedia.org/wiki/Bytecode

Parrotcode
   Home of Parrot virtual machine, made for dynamic languages, to be target for Perl 6 compiler. [Open Source]
   http://www.parrotcode.org/

Virtual Virtual Machine
   VVM overview, history, members, projects, realizations, publications.
   http://vvm.lip6.fr/