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  2. Post office box - Wikipedia

    en.wikipedia.org/wiki/Post_office_box

    PO boxes in the lobby of a U.S. post office. Post office boxes are usually mounted in a wall of the post office, either an external wall or a wall in a lobby, so that staff on the inside may deposit mail in a box, while a key holder (some older post office boxes use a combination dial instead of a key) in the lobby or on the outside of the building may open their box to retrieve the mail.

  3. Coordinated Universal Time - Wikipedia

    en.wikipedia.org/wiki/Coordinated_Universal_Time

    Current time zones. Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce.

  4. Express mail - Wikipedia

    en.wikipedia.org/wiki/Express_mail

    Express mail is an expedited mail delivery service for which the customer pays a premium for faster delivery. Express mail is a service for domestic and international mail, and is in most nations governed by the country's own postal administration. Since 1999, the international express delivery services are governed by the EMS Cooperative. [1]

  5. United States airmail service - Wikipedia

    en.wikipedia.org/wiki/United_States_airmail_service

    The first official experiment at flying air mail to be made under the aegis of the United States Post Office Department took place on September 23, 1911, on the first day of an International Air Meet sponsored by The Nassau Aviation Corporation of Long Island, when pilot Earle L. Ovington flew 640 letters and 1,280 postcards from the Aero Club of New York's airfield located on Nassau Boulevard ...

  6. Commemoration of the American Civil War on postage stamps

    en.wikipedia.org/wiki/Commemoration_of_the...

    Between 1961 and 1965 the USPS released commemoratives on the 100th anniversary of five important battles.. During the Civil War, heroes of the previous national period were featured on the stamps of both sides of the conflict: Washington, Jefferson and Jackson.

  7. POSTNET - Wikipedia

    en.wikipedia.org/wiki/POSTNET

    The Intelligent Mail barcode was originally supposed to be required beginning May 2011 however the USPS postponed the requirement date, allowing mailers to continue receiving automation discount rates using the POSTNET barcode until January 28, 2013, at which time Intelligent Mail barcode was required for those reduced rates.

  8. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    Postal service in the United States began with the delivery of stampless letters whose cost was borne by the receiving person, later encompassed pre-paid letters carried by private mail carriers and provisional post offices, and culminated in a system of universal prepayment that required all letters to bear nationally issued adhesive postage stamps.

  9. STD-4C - Wikipedia

    en.wikipedia.org/wiki/STD-4C

    The STD-4C is the current USPS regulation for any centralized, wall-mounted mailboxes, whether located inside an office high-rise or within a new single-family subdivision as an outdoor centralized mailbox kiosk.