[Why have I been sent here?](https://cs.meta.stackexchange.com/q/599/98)

## Computability
 * https://cs.stackexchange.com/questions/13669/what-is-the-difference-between-an-algorithm-a-language-and-a-problem
 * https://cs.stackexchange.com/questions/991/are-there-minimum-criteria-for-a-programming-language-being-turing-complete
 * https://cs.stackexchange.com/questions/11181/how-to-show-that-a-function-is-not-computable
 * https://cs.stackexchange.com/questions/11209/what-are-common-techniques-for-reducing-problems-to-each-other
 * https://cs.stackexchange.com/questions/5008/differences-and-relationships-between-randomized-and-nondeterministic-algorithms