What is zip meaning?

ZIP stands for "Zone Improvement Plan". It is a postal code system used in the United States to facilitate the efficient sorting and delivery of mail. ZIP codes were introduced in 1963. They are comprised of five digits, with additional four digits added to identify a more specific location. The first digit indicates a broad geographical area, and the subsequent digits define smaller regions within that area. ZIP codes are used not only for mail delivery but also for statistical analysis, marketing, and other purposes.