Zip code can be defined as a system used in the united state by the United state postal service(USPS) to enhance the delivery of mail. The word zip is an acronym for Zone Improvement Plan.
zip codes or postal codes are widely used for routing mails, sorting packages and calculating the time and cost of shipping a package and so on.
What is the differences between zip codes and postal codes?
Zip codes/ postal code format in some countries:
USA: CA 90026 = somewhere in Los Angeles, California
UK: NW2 1QA = somewhere in northwest London, UK
China: 999077 = official postcode for Hong Kong
Japan: 103 = somewhere in Tokyo, Japan