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  2. YouTube Premium - Wikipedia

    en.wikipedia.org/wiki/YouTube_Premium

    On April 20, 2020, support was added for Unified Payments Interface for subscribers in India. In August 2021, YouTube began piloting a second subscription tier, "YouTube Premium Lite" in European markets such as Belgium, Denmark, Finland, Luxembourg, Norway and Sweden, at a price point of €6.99.

  3. Rebate (marketing) - Wikipedia

    en.wikipedia.org/wiki/Rebate_(marketing)

    Rebate (marketing) In marketing, a rebate is a form of buying discount and is an amount paid by way of reduction, return, or refund that is paid retrospectively. It is a type of sales promotion that marketers use primarily as incentives or supplements to product sales. Rebates are also used as a means of enticing price-sensitive consumers into ...

  4. Ammonium bituminosulfonate - Wikipedia

    en.wikipedia.org/wiki/Ammonium_bituminosulfonate

    100.029.485. Ichthammol or ammonium bituminosulfonate (brand name Ichthyol) is a medication derived from sulfur -rich oil shale (bituminous schists). It is used (sometimes in combination with zinc oxide) as a treatment for different skin diseases, including eczema and psoriasis (see below). It is applied on the skin as an ointments, most ...

  5. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  6. Gold reserve - Wikipedia

    en.wikipedia.org/wiki/Gold_reserve

    Official U.S. gold reserve since 1900 Changes in Central Bank Gold Reserves by Country 1993–2014 Central 2005 and 2014. A gold reserve is the gold held by a national central bank, intended mainly as a guarantee to redeem promises to pay depositors, note holders (e.g. paper money), or trading peers, during the eras of the gold standard, and also as a store of value, or to support the value of ...

  7. Hydrogen peroxide - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_peroxide

    Hydrogen peroxide ( H2O2) is a nonplanar molecule with (twisted) C 2 symmetry; this was first shown by Paul-Antoine Giguère in 1950 using infrared spectroscopy. [9] [10] Although the O−O bond is a single bond, the molecule has a relatively high rotational barrier of 386 cm −1 (4.62 kJ / mol) for rotation between enantiomers via the trans ...

  8. Gift card - Wikipedia

    en.wikipedia.org/wiki/Gift_card

    A gift card, also known as a gift certificate in North America, or gift voucher or gift token in the UK, [1] is a prepaid stored-value money card, usually issued by a retailer or bank, to be used as an alternative to cash for purchases within a particular store or related businesses. Gift cards are also given out by employers or organizations ...

  9. 100% renewable energy - Wikipedia

    en.wikipedia.org/wiki/100%_renewable_energy

    100% renewable energy is an energy system where all energy use is sourced from renewable energy sources. The endeavor to use 100% renewable energy for electricity, heating/cooling and transport is motivated by global warming, pollution and other environmental issues, as well as economic and energy security concerns.

  10. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Morse code. Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. [3] [4] Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy .

  11. Click-through rate - Wikipedia

    en.wikipedia.org/wiki/Click-through_rate

    Click-through rate ( CTR) is the ratio of clicks on a specific link to the number of times a page, email, or advertisement is shown. It is commonly used to measure the success of an online advertising campaign for a particular website, as well as the effectiveness of email campaigns. [1] [2] Click-through rates for ad campaigns vary tremendously.