Simple mental reference tools like the six reliability curves and mean time between failure, pareto distribution, network and cascading effects, shortest paths and solvability, recursion, mutability locking and versioning, complexity classes, logical contrapositives, dependent and independent probability, are all things the fortune file seemed to have quips about and if you had a sense of humor, you could map them to everyday situations. Hackers are an old trope now, but when you read these together again, it was a very rich and distinct culture and way of thinking. I appreciate seeing these put together.