Postal Codes - Is That a Thing?

In 19 78, jimmy carter selected a new postmaster general named f bolger. Bolger expanded zip codes from five digits to nine digits. And the deal bulger offered companies is, if you put full nine digit zips on all your mail and like, swordit, prepare it so our people can just pick it up and deliver it, we'll give you a huge discount. So thats, that's what presorting is, like, a business that's going to send junk mail, basically does postal worker work in exchange for a deal.