You'll love what Alan Kay has been working on: http://vpri.org/pdf/tr2007008_steps.pdf http://vpri.org/pdf/tr2007008_steps.pdf You'll be especially enamored of

You'll love what Alan Kay has been working on: http://vpri.org/pdf/tr2007008_steps.pdf http://vpri.org/pdf/tr2007008_steps.pdf You'll be especially enamored of their 200-line TCP/IP implementation, introduced on p17 and reproduced with documentation starting on p44. It's implemented as a grammar in their meta-language that parses the ASCII-art diagrams in the RFCs and executes them.