USA ZIP+4 Code (for supposedly faster deliveries)

Title is incorrect.

> However, the new format was not adopted universally by the public; it eventually became obsolete with modern technology. In general, mail is read by a multiline optical character reader (MLOCR) that almost instantly determines the correct ZIP+4 Code from the address—along with the even more specific delivery point—and sprays an Intelligent Mail barcode (IMb) on the face of the mail piece that corresponds to 11 digits—nine for the ZIP+4 Code and two for the delivery point.

Sherlock

I love spotting those patterns were when something goes popular somewhere, instantly suspiciously related topics start pooping up on HN.

as I go further up the chain i have found most content comes from very few sources, and almost everything else is regurgitated