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  2. Criticism of Amazon - Wikipedia

    en.wikipedia.org/wiki/Criticism_of_Amazon

    Amazon.com offers the option to add an item to a user's cart or purchase it immediately with 1-Click. The company has been criticized for its alleged use of patents as a competitive hindrance; its " 1-Click patent" [2] may be the best-known example. Amazon's use of the 1-click patent against competitor Barnes & Noble 's website led the Free ...

  3. Android version history - Wikipedia

    en.wikipedia.org/wiki/Android_version_history

    The version history of the Android mobile operating system began with the public release of its first beta on November 5, 2007. The first commercial version, Android 1.0, was released on September 23, 2008. The operating system is developed by Google on a yearly cadence since at least 2011. [1] New major releases are announced at Google I/O in ...

  4. Amazon rainforest - Wikipedia

    en.wikipedia.org/wiki/Amazon_rainforest

    In 2022, about 20% of the Amazon rainforest has already been deforested and a further 6% was "highly degraded". Research suggests that upon reaching about 20–25% (hence 0–5% more), the tipping point to flip it into a non-forest ecosystem – degraded savannah – (in eastern, southern and central Amazonia) will be reached.

  5. Deforestation of the Amazon rainforest - Wikipedia

    en.wikipedia.org/wiki/Deforestation_of_the...

    The National Institute for Space Research (INPE) in Brazil estimated that at least 7,747 km 2 (2,991 sq mi) of the Brazilian Amazon rainforest were cleared during the first half of 2019. [63] INPE subsequently reported that deforestation in the Brazilian Amazon reached a 12-year high between August 2019 and July 2020.

  6. 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 ...

  7. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    In 1629, Isaac Beeckman proposed an experiment in which a person observes the flash of a cannon reflecting off a mirror about one mile (1.6 km) away. In 1638, Galileo Galilei proposed an experiment, with an apparent claim to having performed it some years earlier, to measure the speed of light by observing the delay between uncovering a lantern ...

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