The oldest profession

A doctor, a lawyer, an engineer, and a computer programmer were waiting for a bus when they got to discussing which had the oldest profession. Obviously it was law, said the lawyer. Moses gave the 10 commandments over 3,000 yrs ago, and that's older than either of your jobs. Not so fast, says the doctor. Before that, God created Eve out of Adam's rib, and that was a surgical procedure at least, so mine is older than all of yours! Hey, that's pretty good, said the engineer, but even before that, God created the universe out of chaos, which was the first engineering job ever, and before any of those other things. They all turned and looked smugly at the programmer, whose tools of the trade were well know no be only a few decades old. He smiled back and said: "Ah, but where do u think the "chaos" came from?"