Do ya think the extra 4 digits on a zip code make the mail move and be delivered faster?

[LogDog75]

8. Probably

Zip Codes are designed to narrow down to the nearest post office the mail is to be delivered in. The Plus-4 codes allows the local post office to narrow the delivery even more.

An analogy to Zip Codes would be National Stock Numbers (NSNs) the federal government uses. I worked in medical supply in the AF and we used NSNs not only to identify material from drugs to dressings but it helped in easily finding them in a ware house. The first four numbers are the federal stock class, the next two numbers are a NATO identifier, the the remaining seven numbers identified the item. For example, 6505-00-116-1064 is Dextrose in Lactated Ringer's Injection. When we stored them in the warehouse, we'd put them in numerical sequence by federal stock class. So if we had a requisition for this item, we'd go to the section for 6505 and then look the for item using the last seven numbers. IOWs, it pinpointed were something was the same way Zip Codes narrow where the mail is to be delivered.