I participated in the design and development of a couple of concurrency libraries for shared-memory multiprocessors long before such machines were popular. So when I started using java.util.concurrent I was already somewhat comfortable with the concepts.
A quine is a program that prints its own source code (without any access to it). Typically quines are obscure code that few people can understand, and when run, they print the same obscure code that few people can understand. I've seen a similar trait in