I did some computational biology in a course at university. In one lecture on the mechanics of how chromasones turn into proteins, I read through the notes at the beginning of the lecture and said "its a programming language." found it had a scanner and a parser (the transcription and the folding process), an error correction mechanism, garbage collection, etc.
Then sat through another 49 minutes and 30 seconds of lecturing.
Its an intensely complex chemical process that brings about a fiendishly simple (from a programmers point of view) result. Love it.