In the larger populated cities of the time, merchants found a way to cater to busy customers who had little time or energy to prepare food during the evening. The variation in Chinese cuisine from different regions led caterers to create a list or menu for their patrons.
ZIP Code began on July 1, 1963, as scheduled. Use of the new code was not mandatory at first for anyone, but, in 1967, the Post Office required mailers of second- and third-class bulk mail to presort by ZIP Code. Although the public and mailers alike adapted well to its use, it was not enough.
Mr. Zip - A cartoon character, created by Harold Wilcox of the Cunningham and Walsh advertising company, used by USPS in the 1960s and '70s to promote the ZIP Code system. Secret - The President and his family have their own, private ZIP Code that is not publicly known. 1  History of Post Office Technology. 2  Two Letter US State and Possession Postal Service Abbreviations. 3  Free Downloadable ZIP Codes Database for Microsoft Access. 4  Mail Delivery Could be Even Slower Than USPS Admits, GAO Finds.