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.
Best Answer: Marketing Dictionary: ZIP code. Abbreviation for Zoning Improvement Plan code established by the U.S. Postal Service to identify numerically the destination of a mailing piece for easier sorting and dispatching. The original five-digit zip code has been expanded by four digits and is now called the ZIP + 4 code (see nine-digit zip code). Business Dictionary: Zip Code. Five-digit numerical code defined by the U.S. Postal Service to simplify and expedite mail distribution.