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A post office, historically also a posthouse, is a facility forming part of a postal system for the posting, receipt, sorting, handling, transmission or delivery of mail, such as letters, small packages, and usually money. Post offices offer mail-related services such as acceptance of mail and sale of postage stamps, post office boxes, and sale of packaging and stationery. In addition, some post offices offer non-postal services such as passport applications and other government forms, car tax purchase, money orders, and banking services. A post office may have a main customer service and point of sale area. Many postal codes or ZIP codes route an item to a specific post office; some correspond to a specific route or even delivery point. In a "sorting office" or "delivery office", mail is sorted or processed for delivery. Large open spaces for sorting mail are also sometimes known as a sorting hall or postal hall. Over time, sophisticated mail sorting and delivery equipment has been developed, including Mail Rail. In Commonwealth countries, many of the larger post office buildings in capital cities used the official title of General Post Office. In parts of Europe, special Postal censorship offices were known as Cabinets Noirs. (via Freebase)