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  2. npm left-pad incident - Wikipedia

    en.wikipedia.org/wiki/Npm_left-pad_incident

    Around two hours after the original left-pad package was removed, npm manually "un-un-published" the original 0.0.3 version by restoring a backup. [1] Laurie Voss, chief technology officer of npm, wrote that the company "picked the needs of the many" despite internal disagreements about whether the action was "the right call". [10]

  3. Help:Markup validation - Wikipedia

    en.wikipedia.org/wiki/Help:Markup_validation

    The W3C is the main international standards organization for the internet— they provide the W3C Markup Validation Service. Simply copy the full URL of the page to be validated and paste in into the validator. There is also a favelet that you can add to your browser bookmarks that will validate the current page.

  4. What can I do if my credit card billing error dispute ... - AOL

    www.aol.com/finance/credit-card-billing-error...

    Credit card issuers must provide an explanation for denying your billing error dispute.

  5. Payment card number - Wikipedia

    en.wikipedia.org/wiki/Payment_card_number

    A payment card number, primary account number (PAN), or simply a card number, is the card identifier found on payment cards, such as credit cards and debit cards, as well as stored-value cards, gift cards and other similar cards. In some situations the card number is referred to as a bank card number. The card number is primarily a card ...

  6. W3C Markup Validation Service - Wikipedia

    en.wikipedia.org/wiki/W3C_Markup_Validation_Service

    The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.

  7. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    There are several types of security codes and PVV (all generated from DES key in the bank in HSM modules using PAN, expiration date and service code): . The first code, 3 numbers, called CVC1 or CVV1, is encoded on track one and two of the magnetic stripe of the card and used for card present transactions, with signature (second track also contains pin verification value, PVV, but now it is ...

  8. NPM - Wikipedia

    en.wikipedia.org/wiki/NPM

    npm, Inc., a software development and hosting company based in California, United States NPM/CNP (Compagnie Nationale à Portefeuille SA), a Belgian non-listed holding company New People's Militia in Manipur, India

  9. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    Therefore, systems that pad to a specific number of digits (by converting 1234 to 0001234 for instance) can perform Luhn validation before or after the padding and achieve the same result. The algorithm appeared in a United States Patent [ 1 ] for a simple, hand-held, mechanical device for computing the checksum.