yuri ilyinI'm literally 404 about (micro)electronics, but to me it looks like a big bad pinout diagram, no?
In fact it's just a layout of my procedural material that made Cycles black out as soon as another Bump Node is added or the existing one is routed to 'Normal' socket of yet another shader. Each orange area contains several groups of nodes, also about as snarly as though they're going to bark.