Z:gnu-www-ja-dat--c0d65d-To make the survey more effici/en

To make the survey more efficient and broader-based (and thus more accurate), it could be automated. The survey bureau could mail read-write memory cards to the chosen participants, who would connect them momentarily to their DAT units and then mail them back. With proper design, the survey bureau would have no way of knowing who had sent in any particular card, and thus no information about who had copied what, but they would still have an accurate total.