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.
Postal Guide, first published in 1874. Most of the. preferred abbreviations in 1874 remained the. same for nearly the next 90 years. On July 1, 1963, the Post Office Department. implemented the five-digit ZIP Code, which was. placed after the state name in the last line of an.