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  2. Envelope system - Wikipedia

    en.wikipedia.org/wiki/Envelope_system

    The envelope system, also known as the envelope budgeting method or cash stuffing, is a popular personal budgeting method for visualizing and maintaining a flexible budget. The key idea is to prioritize cash income to meet separate categories of household expenses in physically separate envelopes.

  3. Envelope - Wikipedia

    en.wikipedia.org/wiki/Envelope

    The No. 10 envelope is the standard business envelope size in the United States. [6] PWG 5101.1 [7] also lists the following even inch sizes for envelopes: 6 × 9, 7 × 9, 9 × 11, 9 × 12, 10 × 13, 10 × 14 and 10 × 15. Envelopes accepted by the U.S. Postal Service for mailing at the price of a letter must be: Rectangular

  4. Building envelope - Wikipedia

    en.wikipedia.org/wiki/Building_envelope

    The building envelope or enclosure is all of the elements of the outer shell that maintain a dry, heated, or cooled indoor environment and facilitate its climate control. Building envelope design is a specialized area of architectural and engineering practice that draws from all areas of building science and indoor climate control. [2]

  5. Common envelope - Wikipedia

    en.wikipedia.org/wiki/Common_envelope

    Bottom: The envelope is ejected or the two stars merge. In astronomy, a common envelope (CE) is gas that contains a binary star system. [1] The gas does not rotate at the same rate as the embedded binary system. A system with such a configuration is said to be in a common envelope phase or undergoing common envelope evolution.

  6. Mail - Wikipedia

    en.wikipedia.org/wiki/Mail

    Mail envelope (back to back) The word mail comes from the Middle English word male, referring to a travelling bag or pack. [2] It was spelled in that manner until the 17th century and is distinct from the word male. The French have a similar word, malle, for a trunk or large box, and mála is the Irish term for a bag.

  7. Philatelic cover - Wikipedia

    en.wikipedia.org/wiki/Philatelic_cover

    A philatelic cover is an envelope prepared with a stamp(s) and address and sent through the mail delivery system for the purpose of creating a collectible item. Stamp collectors began to send mail to each other and to themselves early on, and philatelic mail is known from the late 19th century onward.

  8. Registered mail - Wikipedia

    en.wikipedia.org/wiki/Registered_mail

    [citation needed] The service also allows the receiver to track their package/envelope through the online system at usps.com using the unique tracking number provided by the mailer. [15] Certified mail can be combined with (for an additional fee) or without "return receipt requested" service, often called "RRR."

  9. Internal mail - Wikipedia

    en.wikipedia.org/wiki/Internal_mail

    In a large organization with many employees, there is frequently an internal mail system. The post room or mail room sorts the incoming mail and the 'mailboy' or 'mail clerk' takes it around on a trolly to the various pigeon-holes and direct to the desks of other colleagues. Interdepartment Delivery inter-office envelope