I found the Hartree reference quoted in the American Mathematical Society Journal from 1960... I had half hoped that the "6" in 1960 along with the six possible answers were pointing me toward an answer of 1960 and the AMS article published in 1960 seemed to support that strongly but noticed as I pushed the button it said Trivia rather then Humor as a category.

It would appear a lack of knowledge of the history of Micro-processing stood in my way. As an English Major with a minor in Education, I did not study the Manchester Machine. (http://plato.stanford.edu/entries/computing-history/)

I am curious as to how the SQL language is related to this particular piece of trivia. Did SQL develop from the mathematics for a micro-processor style of defensive programming?