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  2. GS1 DataBar Coupon - Wikipedia

    en.wikipedia.org/wiki/GS1_DataBar_Coupon

    For example, a coupon may offer a $1.00 discount when the consumer purchases a specific brand and flavor of toothpaste. During the early years of its use, many checkout registers systems could not read GS1 DataBar barcodes. Consequently, coupons would have both a GS1 DataBar coupon and a traditional UPC/EAN barcode coupon for older registers.

  3. Pareto principle - Wikipedia

    en.wikipedia.org/wiki/Pareto_principle

    The Pareto principle may apply to fundraising, i.e. 20% of the donors contributing towards 80% of the total. The Pareto principle (also known as the 80/20 rule, the law of the vital few and the principle of factor sparsity [1] [2]) states that for many outcomes, roughly 80% of consequences come from 20% of causes (the "vital few").

  4. Telephone numbers in China - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_China

    Landline telephone numbers have area codes, whereas mobile numbers do not. In major cities, landline numbers consist of a two-digit area code followed by an eight-digit local number. In other places, landline numbers consist of a three-digit area code followed by a seven- or eight-digit local number. Mobile phone numbers consist of eleven digits.

  5. Area code 219 - Wikipedia

    en.wikipedia.org/wiki/Area_code_219

    Area code 219 is a telephone area code in the North American Numbering Plan for Northwest Indiana, including the state's portion of the Chicago metropolitan area.

  6. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    One of the earliest companies to make headphones for wireless operators was the Holtzer-Cabot Company in 1909. [20] They were also makers of head receivers for telephone operators and normal telephone receivers for the home. [20] Another early manufacturer of headphones was Nathaniel Baldwin. [21]

  7. Asia - Wikipedia

    en.wikipedia.org/wiki/Asia

    Map of the most populous part of Asia showing physical, political, and population characteristics, as per 2024. Asia (/ ˈ eɪ ʒ ə / ⓘ AY-zhə, UK also / ˈ eɪ ʃ ə / AY-shə) is the largest continent [note 1] [10] [11] in the world by both land area and population. [11]