Mail, or post, is a method for transmitting information and tangible objects, wherein written documents A document is a bounded physical representation of a body of information designed with the capacity (and usually intent) to communicate. A document may manifest symbolic, diagrammatic or sensory-representational information. To document (verb) is to produce a document artifact by collecting and representing information. In prototypical usage, a, typically enclosed in envelopes An envelope is a packaging product, usually made of flat material such as paper or cardboard, and designed to contain a flat object, which in a postal-service context is usually a letter, card or bills. The traditional type is made from a sheet of paper cut to one of three shapes: the rhombus , the short-arm cross, and the kite. These designs and also small packages are delivered to destinations around the world. Anything sent through the postal system is called mail or post.[1]
In principle, a postal service can be private or public. Governments often place restrictions on private postal delivery systems System is a set of interacting or interdependent entities forming an integrated whole. Since the mid 19th century national postal systems have generally been established as government monopolies with a fee on the article prepaid. Proof of payment is often in the form of adhesive postage stamps A postage stamp is adhesive paper evidence of a fee paid for postal services. Usually a small rectangle attached to an envelope, the stamp signifies the person sending it has fully or partly paid for delivery. Postage stamps are the most popular way of paying for retail mail; alternatives include postal stationery such as prepaid-postage envelopes,, but postage meters A postage meter is a mechanical device used to create and apply physical evidence of postage to mailed matter. Postage meters are regulated by a country's postal authority; for example, in the United States, the United States Postal Service specifies the rules for the creation, support, and use of postage meters. A postage meter imprints an amount are also used for bulk mailing.
Postal systems often have functions other than sending letters. In some countries, a Postal Telegraph and Telephone A postal, telegraph, and telephone service is or was a government agency responsible for postal mail, telegraph, and telephone services. Such monopolies existed in many countries, though not in North America or Japan. Many PTTs have been partially or completely privatized in recent years. In some of those privatizations, the PTT was renamed (PTT) service oversees the postal system as well as having authority over telephone and telegraph systems. Some countries' postal systems allow for savings accounts and handle applications for passports.
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