The history of orthodontics has been intimately linked with the history of dentistry for more than 2000 years. Dentistry had its origins as a part of medicine.
Addressing an envelope to a post office box address is just like addressing envelopes to any other type of address. Of course, before you can address the envelope, you need the name of the recipient, the post office box number and the city, state and ZIP code.
A. 1  1. Go to and go to PO Boxes Online. 2  2. Enter either a valid street address or a ZIP Code under âSearch for a PO Box.â. 3  3. Click Search and select a PO Box at a specific Post Office location.  1. Search for an available PO Box by entering an address or a ZIP Code in âSearch for a PO Box.â.