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  2. Contactless payment - Wikipedia

    en.wikipedia.org/wiki/Contactless_payment

    EMV contactless symbol used on compatible payment terminals. EMV stands for "Europay, Mastercard, and Visa", the three companies that created the standard.Contactless payment systems are credit cards and debit cards, key fobs, smart cards, or other devices, including smartphones and other mobile devices, that use radio-frequency identification (RFID) or near-field communication (NFC) for ...

  3. Scientific method - Wikipedia

    en.wikipedia.org/wiki/Scientific_method

    The scientific method is an empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century. The scientific method involves careful observation coupled with rigorous scepticism, because cognitive assumptions can distort the interpretation of the observation.

  4. Indigo dye - Wikipedia

    en.wikipedia.org/wiki/Indigo_dye

    Two different methods for the direct application of indigo were developed in England in the 18th century and remained in use well into the 19th century. The first method, known as 'pencil blue' because it was most often applied by pencil or brush, could be used to achieve dark hues. Arsenic trisulfide and a thickener were added to the indigo ...

  5. Hewlett-Packard spying scandal - Wikipedia

    en.wikipedia.org/wiki/Hewlett-Packard_spying_scandal

    The media descended upon HP headquarters on September 22, 2006. On September 5, 2006, Newsweek revealed [1] that the general counsel of Hewlett-Packard, at the behest of HP chairwoman Patricia Dunn, had contracted a team of independent security experts to investigate board members and several journalists in order to identify the source of an information leak. [2]

  6. List of Hewlett-Packard products - Wikipedia

    en.wikipedia.org/wiki/List_of_Hewlett-Packard...

    Following HP's acquisition of Compaq in 2002, this series of notebooks was discontinued, replaced with the HP Pavilion, HP Compaq, and Compaq Presario notebooks. The line would be reintroduced in 2024 as a consumer-oriented line of notebooks replacing the old Pavilion and Spectre series of notebooks.

  7. Rubber stamp - Wikipedia

    en.wikipedia.org/wiki/Rubber_stamp

    A rubber stamp, and the message stamped by it Ink pad from second half of the 20th century, in the Museo del Objeto del Objeto collection. A rubber stamp is an image or pattern that has been carved, molded, laser engraved, or vulcanized onto a sheet of rubber.

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