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2. Merchant category code - Wikipedia

   en.wikipedia.org/wiki/Merchant_category_code

   A merchant category code (MCC) is a four-digit number used for retail financial services to classify a business by the types of goods or services it provides. Codes are specified by the ISO 18245 standard.

3. Playing cards in Unicode - Wikipedia

   en.wikipedia.org/wiki/Playing_cards_in_Unicode

   The Playing Cards block contains one emoji: U+1F0CF PLAYING CARD BLACK JOKER. [1] [2] The emoji presentation sequences refine and colorize the text presentation of the playing card suits. ♠︎♥︎♦︎♣︎ becomes ♠️♥️♦️♣️. This was done by appending the U+FE0F code point to the textual code points shown far above.

4. Payment card interchange fee and merchant discount antitrust ...

   en.wikipedia.org/wiki/Payment_Card_Interchange...

   The payment card interchange fee and merchant discount antitrust litigation is a United States class-action lawsuit filed in 2005 by merchants and trade associations against Visa, Mastercard, and numerous financial institutions that issue payment cards.

5. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_Code

   The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

6. vCard - Wikipedia

   en.wikipedia.org/wiki/VCard

   jCard, "The JSON Format for vCard" is a standard proposal of 2014 in RFC 7095.RFC 7095 describes a lossless method of representing vCard instances in JSON, using arrays of sequence-dependent tag–value pairs. jCard has been incorporated into several other protocols, including RDAP, the Protocol to Access White Space Databases (PAWS, described in RFC 7545), and SIP, which (via RFC 8688) uses ...

7. PromotionCode.org - Wikipedia

   en.wikipedia.org/wiki/PromotionCode.org

   PromotionCode.org is a coupon website that provides promotional codes and print coupons to consumers. The corporation's headquarters is in Tallahassee, Florida and it has a west coast office in Las Vegas, Nevada.