From the December 1970 magazine.

About Alcoholism - Alcoholism Information, Research and Treatment

Push-Button Sobriety Test

General Motors is developing a numbers game with an automotive-safety twist. The device, built into the instrument panel, displays for a few seconds a random number of up to five digits from one to nine the moment the ignition key is turned on.

Then the numbers disappear and keys on a board, just below a scoreboard, are illuminated. The keyboard is similar to that of a push-button telephone.

-- New York Times

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