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  2. Diplomatic correspondence - Wikipedia

    en.wikipedia.org/wiki/Diplomatic_correspondence

    Letters are correspondence between heads of state, typically used for the appointment and recall of ambassadors; for the announcement of the death of a sovereign or an accession to the throne; or for expressions of congratulations or condolence. [1] Letters between two monarchs of equal rank will typically begin with the salutation "Sir My ...

  3. Letter of credence - Wikipedia

    en.wikipedia.org/wiki/Letter_of_credence

    A letter of credence (French: Lettre de créance, [lɛtʁ də kʁeɑ̃s]) is a formal diplomatic letter that designates a diplomat as ambassador to another sovereign state. Commonly known as diplomatic credentials , the letter is addressed from one head of state to another, asking them to give credence ( French : créance ) to the ambassador's ...

  4. Offer and acceptance - Wikipedia

    en.wikipedia.org/wiki/Offer_and_acceptance

    For example, in some jurisdictions, a minimum requirement for sale of goods contracts is the following four terms: delivery date, price, terms of payment that includes the date of payment, and a detailed description of the item on offer including a fair description of the condition or type of service.

  5. YouTube - Wikipedia

    en.wikipedia.org/wiki/YouTube

    YouTube is an American social media and online video sharing platform owned by Google.YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim, three former employees of PayPal.

  6. Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia

    In addition to the point-for-point disagreement between these two parties, others have examined the sample size and selection method used in the Nature effort, and suggested a "flawed study design" (in Nature ' s manual selection of articles, in part or in whole, for comparison), absence of statistical analysis (e.g., of reported confidence ...

  7. Data - Wikipedia

    en.wikipedia.org/wiki/Data

    The most common digital computers use a binary alphabet, that is, an alphabet of two characters typically denoted "0" and "1". More familiar representations, such as numbers or letters, are then constructed from the binary alphabet. Some special forms of data are distinguished.

  8. Social media - Wikipedia

    en.wikipedia.org/wiki/Social_media

    The PLATO system was launched in 1960 at the University of Illinois and subsequently commercially marketed by Control Data Corporation.It offered early forms of social media features with innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowdsourced online newspaper, and blog ...

  9. Proof of work - Wikipedia

    en.wikipedia.org/wiki/Proof_of_work

    It was designed as an anti-spam mechanism that required email senders to perform a small computational task, effectively proving that they expended resources (in the form of CPU time) before sending an email. This task was trivial for legitimate users but would impose a significant cost on spammers attempting to send bulk messages.