To the Editor:—
My scientific inquiring spirit and just plain curiosity have been aroused by the computer-produced mailing label on my copy of The Journal. Would you please be so kind as to explain what the numbers represent.There are 27 characters in the keyline of each subscriber. For purposes of demonstration we shall number these 1 through 27, using Dr. Pent's code numbers in parentheses.
(G)—The first character is a traffic key to indicate mailing and car loading sequence for distribution from the printing plant.
(85004)—Postal Zip Code.
(00)—These two character spaces represented the County Code on the old labels, but are no longer needed and are replaced by 00 on revised labels.
(0351954079) —Personal Code. For domestic physicians this ten-digit code is the Medical Education number of the physician. For non-physicians the first three positions in this code