Zip codes Maryland Cecil
According to an innovation, first three digits in a five-digit ZIP code corresponded to number of one or another sectional centre facility on sorting of the items of mail which were flown down from post offices which have been attributed to this sorting point. Last two digits meant post office number where it was necessary to direct correspondence and in case of big cities coincided with former number of post district. As a result the address began to look in such way: Mr. Paul Jones 3256 Epiphenomenal Avenue Minneapolis 55416, MinnesotaIn modern conditions, with introduction of the highly technological equipment for mail sorting, it is enough to use a five-digit ZIP code.ZIP Codes are inherently discrete data, or point based data, as they are assigned only at the point of delivery, not the spaces in between the delivery points.
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