A letter is a written message conveyed from one person to another through a medium. Something epistolary means that it is a form of letter writing. The term usually excludes written material intended to be read in its original form by large numbers of people, such as newspapers and placards, although even these may include material in the form of an "open letter". The typical form of a letter for many centuries, and the archetypal concept even today, is a sheet of paper that is sent to a correspondent through a postal system. A letter can be formal or informal, depending on its audience and purpose. Besides being a means of communication and a store of information, letter writing has played a role in the reproduction of writing as an art throughout history. Letters have been sent since antiquity and are mentioned in the Iliad. Historians Herodotus and Thucydides mention and use letters in their writings.
The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the U.S., its insular areas, and its associated states. It is one of the few government agencies explicitly authorized by the Constitution of the United States. The USPS, as of 2021, has 516,636 career employees and 136,531 non-career employees.
The mail or post is a system for physically transporting postcards, letters, and parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid-19th century, national postal systems have generally been established as a government monopoly, with a fee on the article prepaid. Proof of payment is usually in the form of an adhesive postage stamp, but a postage meter is also used for bulk mailing.
A postal code is a series of letters or digits or both, sometimes including spaces or punctuation, included in a postal address for the purpose of sorting mail.
A ZIP Code is a system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that the mail travels more efficiently and quickly when senders use the code in the postal address.
Postal codes used in the United Kingdom, British Overseas Territories and Crown dependencies are known as postcodes. They are alphanumeric and were adopted nationally between 11 October 1959 and 1974, having been devised by the General Post Office. A full postcode is known as a "postcode unit" and designates an area with several addresses or a single major delivery point.
Canada Post Corporation, trading as Canada Post, is a Crown corporation that functions as the primary postal operator in Canada.
The Private Express Statutes (PES) are a group of United States federal civil and criminal laws placing various restrictions on the carriage and delivery of letters by all organizations other than the United States Postal Service.
A Canadian postal code is a six-character string that forms part of a postal address in Canada. Like British, Irish and Dutch postcodes, Canada's postal codes are alphanumeric. They are in the format A1A 1A1, where A is a letter and 1 is a digit, with a space separating the third and fourth characters. As of October 2019, there were 876,445 postal codes using Forward Sortation Areas from A0A in Newfoundland to Y1A in Yukon.
A postal worker is one who works for a post office, such as a mail carrier. In the U.S., postal workers are represented by the National Association of Letter Carriers, AFL–CIO, National Postal Mail Handlers Union – NPMHU, the National Association of Rural Letter Carriers and the American Postal Workers Union, part of the AFL–CIO. In Canada, they are represented by the Canadian Union of Postal Workers and in the United Kingdom by the Communication Workers Union.
A mail carrier, also referred to as a mailman, mailwoman, postal carrier, postman, postwoman, postperson, letter carrier, or colloquially postie, is an employee of a post office or postal service who delivers mail and parcel post to residences and businesses. The term "mail carrier" came to be used as a gender-neutral substitute for "mailman" soon after women began performing the job. In the Royal Mail, the official name changed from "letter carrier" to "postman" in 1883, and "postwoman" has also been used for many years.
A post office box is a uniquely addressable lockable box located on the premises of a post office.
A letter box, letterbox, letter plate, letter hole, mail slot or mailbox is a receptacle for receiving incoming mail at a private residence or business. For outgoing mail, Post boxes are often used for depositing the mail for collection, although some letter boxes are also capable of holding outgoing mail for a carrier to pick up. Letterboxes or mailboxes use the following primary designs:
An address is a collection of information, presented in a mostly fixed format, used to give the location of a building, apartment, or other structure or a plot of land, generally using political boundaries and street names as references, along with other identifiers such as house or apartment numbers and organization name. Some addresses also contain special codes, such as a postal code, to make identification easier and aid in the routing of mail.
A post town is a required part of all postal addresses in the United Kingdom and Ireland, and a basic unit of the postal delivery system. Including the correct post town in the address increases the chance of a letter or parcel being delivered on time. Post towns in general originated as the location of delivery offices. As of 2004, their main function is to distinguish between localities or street names in addresses not including a postcode.
The National Association of Letter Carriers (NALC) is an American labor union, representing non-rural letter carriers employed by the United States Postal Service. It was founded in 1889. The NALC has 2,500 local branches representing letter carriers in all 50 states, the District of Columbia, Puerto Rico, the Virgin Islands and Guam.
The Canadian Union of Postal Workers is a public-sector trade union representing postal workers including letter carriers, rural and suburban mail carriers, postal clerks, mail handlers and dispatchers, technicians, mechanics and electricians employed at Canada Post as well as private sector workers outside Canada Post. Currently comprising upwards of 50,000 members, the Canadian Union of Postal Workers has historically been labeled as militant because of some of the actions undertaken since its inception in 1965 to help guarantee rights to all postal workers. According to former president Jean-Claude Parrot, "We succeeded to get the support of the membership because we earned our credibility with them...we got that reputation [of militancy] because we earned it."
Rural letter carriers are United States Postal Service and Canada Post employees who deliver mail in what are traditionally considered rural and suburban areas of the United States and Canada. Before Rural Free Delivery (RFD), rural Americans and Canadians were required to go to a post office to get their mail.
Postcodes in Australia are used to more efficiently sort and route mail within the Australian postal system. Postcodes in Australia have four digits and are placed at the end of the Australian address, before the country. Postcodes were introduced in Australia in 1967 by the Postmaster-General's Department and are now managed by Australia Post, Australia's national postal service. Postcodes are published in booklets available from post offices or online from the Australia Post website.
The National Rural Letter Carriers' Association (NRLCA) is an American labor union that represents the rural letter carriers of the United States Postal Service (USPS). The NRLCA negotiates all labor agreements for the rural carrier craft with the USPS, including salaries, and represents members of the rural carrier craft in the grievance procedure. The NRLCA's stated goal is to "improve the methods used by rural letter carriers, to benefit their conditions of labor with the United States Postal Service, and to promote a fraternal spirit among its members."
