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  2. Mail - Wikipedia

    en.wikipedia.org/wiki/Mail

    Mail. A postman collecting mail for delivery. The mail or post is a system for physically transporting postcards, letters, and parcels. [1] A postal service can be private or public, though many governments place restrictions on private systems.

  3. United States Postal Service - Wikipedia

    en.wikipedia.org/wiki/United_States_Postal_Service

    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 United States, its insular areas, and its associated states.

  4. Postal Clause - Wikipedia

    en.wikipedia.org/wiki/Postal_Clause

    Postal Clause. Article I, Section 8, Clause 7 of the United States Constitution, known as the Postal Clause or the Postal Power, empowers Congress "To establish Post Offices and post Roads ." The Post Office has the constitutional authority to designate mail routes.

  5. Registered mail - Wikipedia

    en.wikipedia.org/wiki/Registered_mail

    Registered mail is a postal service in many countries which allows the sender proof of mailing via a receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. Depending on the country, additional services may also be available, such as:

  6. Franking - Wikipedia

    en.wikipedia.org/wiki/Franking

    Franking comprises all devices, markings, or combinations thereof (" franks ") applied to mails of any class which qualifies them to be postally serviced. Types of franks include uncanceled and precanceled postage stamps (both adhesive and printed on postal stationery ), impressions applied via postage meter (via so-called "postage evidencing ...

  7. Post office - Wikipedia

    en.wikipedia.org/wiki/Post_office

    A post office is a public facility and a retailer that provides mail services, such as accepting letters and parcels, providing post office boxes, and selling postage stamps, packaging, and stationery. Post offices may offer additional services, which vary by country.

  8. Email - Wikipedia

    en.wikipedia.org/wiki/Email

    EMail is a traditional form used in RFCs for the "Author's Address". The service is often simply referred to as mail, and a single piece of electronic mail is called a message. The conventions for fields within emails—the "To", "From", "CC", "BCC" etc.—began with RFC-680 in 1975.

  9. Postal code - Wikipedia

    en.wikipedia.org/wiki/Postal_code

    A postal code (also known locally in various English-speaking countries throughout the world as a postcode, post code, PIN or ZIP 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.

  10. Postal history - Wikipedia

    en.wikipedia.org/wiki/Postal_history

    Postal history is the study of postal systems and how they operate and, or, the study of the use of postage stamps and covers and associated postal artifacts illustrating historical episodes in the development of postal systems.

  11. Postage stamp - Wikipedia

    en.wikipedia.org/wiki/Postage_stamp

    A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail).