What does Zip code mean?
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. The United States is divided into 10 large geographical areas, with the first ZIP code digit 0 in the northeast and 9 in the west. The second and third digits are used to divide states; the fourth and fifth digits represent local delivery areas. Britannica Concise Encyclopedia: zip code System of postal-zone codes (zip stands for “zone improvement plan”) introduced in the U.S. in 1963 to improve mail delivery and exploit electronic reading and sorting capabilities. The original code, which corresponds to the postal codes
