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2. 84+ best 4th of July sales to shop - AOL

   www.aol.com/news/84-best-4th-july-sales...

   Amerisleep: $500 off any mattress with code JULY500, 40% off upholstered bed frames (with purchase of a mattress), 20% off pillows with code USA20, 20% off mattress toppers with code USA20, 20% ...

3. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...

4. Universal Product Code - Wikipedia

   en.wikipedia.org/wiki/Universal_Product_Code

   A UPC barcode. The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an "odd" parity form, which enables ...

5. Solar tracker - Wikipedia

   en.wikipedia.org/wiki/Solar_tracker

   A solar tracker is a device that orients a payload toward the Sun. Payloads are usually solar panels, parabolic troughs, Fresnel reflectors, lenses, or the mirrors of a heliostat . For flat-panel photovoltaic systems, trackers are used to minimize the angle of incidence between the incoming sunlight and a photovoltaic panel, sometimes known as ...

6. Groupon, which has lost 99.4% of its value since its IPO ...

   techcrunch.com/2023/03/31/groupon-which-has-lost...

   A dozen years ago, Groupon shot to fame popularizing the online group buying format, confidently rejecting a $6 billion acquisition offer from Google and instead going public with a $17.8 billion ...

7. TikTok might be going around Apple's in-app purchase rules ...

   www.engadget.com/tiktok-might-be-going-around...

   — David Tesler (@getdavenow) April 30, 2024 Apple notably kicked Fortnite off its app store in 2020 after Epic Games introduced discounts on the game's currency for anyone who directly purchased it.