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  2. Digital coupon - Wikipedia

    en.wikipedia.org/wiki/Digital_coupon

    Digital coupons (also known as e-coupons, e-clips or clipped deals) are the digital analogue of paper coupons which are used to provide customers with discounts or gifts in order to attract the purchase of some products. Mostly, grocery and drug stores offer e-coupon services in loyalty program events. Even though there are still traditional ...

  3. Simple Headphone Mind - Wikipedia

    en.wikipedia.org/wiki/Simple_Headphone_Mind

    Simple Headphone Mind is the second collaboration between Stereolab and Nurse With Wound. As with their first release, Crumb Duck, Stereolab recorded the basic track and then handed it over to Steven Stapleton to do with as he pleased. Unlike with Crumb Duck, listeners can hear the original Stereolab recording, as it was issued under the title ...

  4. Now hear this: These waterproof earbuds are 50% for ... - AOL

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    Even professional musicians are impressed by the audio quality!

  5. en.wikipedia.org

    en.wikipedia.org/wiki/Sony-headphones-coupons

    en.wikipedia.org

  6. Coupon (PWB) - Wikipedia

    en.wikipedia.org/wiki/Coupon_(PWB)

    Coupon (PWB) A coupon or test coupon is a printed circuit board (PCB) used to test the quality of a printed wiring board (PWB) fabrication process. Test coupons are fabricated on the same panel as the PWBs, typically at the edges. Coupons are then inspected to ensure proper layer alignment, electrical connectivity, and cross sectioned to ...

  7. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    The standard deviation σ of X is defined as which can be shown to equal. Using words, the standard deviation is the square root of the variance of X . The standard deviation of a probability distribution is the same as that of a random variable having that distribution. Not all random variables have a standard deviation.