On July 1, 1963, the U.S. Post Office Department introduced the ZIP code program to get a handle on the heaping surplus of mail. Today, those five digits represent much more for American society. Back ...

One of the most important breakthroughs in modern communication lies in an overlooked place. It’s printed onto envelopes, just below the address. Although we think nothing of the ZIP Code these days, ...

We all have one, we know it by heart, and we share it with our neighbors. But chances are you haven't thought that much about this ubiquitous part of American life — the ZIP code. We all know about ...

Most Americans know their ZIP code by heart. They type it into online forms, scribble it on envelopes and memorize it as part of their address. But not everyone knows the original meaning of the term.

Today marks the 50th anniversary of the Zone Improvement Plan, the network of ZIP codes we use for everything from mail delivery to credit card security. The U.S. Postal Service began using the ...

The House passed two bills Monday night that would authorize the U.S. Postal Service to create 76 new ZIP codes for communities nationwide. This is not the first proposed ZIP code upgrade. In December ...

ZIP Code is a widely-known term which is used as a postal code for United States Postal Service (USPS). The main aim of it helps deliver mail faster and efficiently. Postcodes consist of five digits ...

Postmaster General J. Edward Day, left, and two city letter carriers posing with Mr. Zip in 1963. (N/A/United States Postal Service.) Perspective by John Kelly While vacationing at his Texas ranch in ...

Over the summer, CBS News’s “Sunday Morning” did a piece celebrating the anniversary of the U.S. Zip code. A commercial explaining how to use the Zip code showed a sample letter addressed to “Anywhere ...