My favorite ex-quant, N. N. Taleb, outlines the 4th Quadrant.
Thoroughly enjoyable, but I’m a fan.
This table made sense to me:
In information risk management, what sort of events are fat tailed with complex payoff? Or which are not?
I’ve suspected that there is a parallel between software and markets, as both proxy human behavior, yet are percieved as acting autonomously.
The One In Five 
My problems with Taleb aside, I did think it was interesting that he seems to leave security and op. risk out of the 4th quadrant.