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  2. Radio-frequency identification - Wikipedia

    en.wikipedia.org/wiki/Radio-frequency_identification

    ISO-compatible microprocessor cards (Desfire EV1, Seos) US$0.05 to US$5 UHF: 433 MHz Short range devices 1–100 m (3–300 ft) Moderate Part 7: Defense applications, Underground Miner Tracking with active tags US$5 UHF: 865–868 MHz (Europe) 902–928 MHz (North America) ISM band 1–12 m (3–40 ft) Moderate to high Part 6

  3. Debit card - Wikipedia

    en.wikipedia.org/wiki/Debit_card

    A debit card, also known as a check card or bank card, is a payment card that can be used in place of cash to make purchases. The card usually consists of the bank's name, a card number, the cardholder's name, and an expiration date, on either the front or the back. Many new cards now have a chip on them, which allows people to use their card ...

  4. List of largest companies by revenue - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_companies...

    American retail corporation Walmart has been the world's largest company by revenue since 2014. [ 1] The list is limited to the largest 50 companies, all of which have annual revenues exceeding US$130 billion. This list is incomplete, as not all companies disclose their information to the media or general public. [ 3]

  5. Contactless payment - Wikipedia

    en.wikipedia.org/wiki/Contactless_payment

    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 making secure payments. The embedded integrated circuit chip and antenna enable consumers to wave their card ...

  6. MiniDisc - Wikipedia

    en.wikipedia.org/wiki/MiniDisc

    MiniDisc ( MD) is an erasable magneto-optical disc-based data storage format offering a capacity of 60, 74, and later, 80 minutes of digitized audio . Sony announced the MiniDisc in September 1992 and released it in November [2] of that year for sale in Japan and in December in Europe, North America, and other countries. [3]

  7. Television - Wikipedia

    en.wikipedia.org/wiki/Television

    In 2017, YouTube launched YouTube TV, a streaming service that allows users to watch live television programs from popular cable or network channels and record shows to stream anywhere, anytime. [ 190 ] [ 191 ] [ 192 ] As of 2017, 28% of US adults cite streaming services as their main means for watching television, and 61% of those ages 18 to ...

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