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2. Electrical engineering - Wikipedia

   en.wikipedia.org/wiki/Electrical_engineering

   Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph, the telephone ...

3. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   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 brand of cereals contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be ...

4. Hikvision - Wikipedia

   en.wikipedia.org/wiki/Hikvision

   Hiksemi (HikStorage), Ezviz, Hilook, Hiwatch. Hangzhou Hikvision Digital Technology. Company Limited by Shares. Hangzhou Hikvision Digital Technology Co., Ltd., often shortened to Hikvision, is a Chinese state-owned manufacturer and supplier of video surveillance equipment for civilian and military purposes, headquartered in Hangzhou, Zhejiang.

5. Coupon (finance) - Wikipedia

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

   In finance, a coupon is the interest payment received by a bondholder from the date of issuance until the date of maturity of a bond . Coupons are normally described in terms of the "coupon rate", which is calculated by adding the sum of coupons paid per year and dividing it by the bond's face value. For example, if a bond has a face value of ...

6. Copyright infringement - Wikipedia

   en.wikipedia.org/wiki/Copyright_infringement

   Psion Software claimed in 1983 that software piracy cost it £2.9 million a year, 30% of its revenue. Will Wright said that Raid on Bungeling Bay sold 20,000 copies for the Commodore 64 in the US, but 800,000 cartridges for the Nintendo Famicom with a comparable installed base in Japan, "because it's a cartridge system [so] there's virtually no ...

7. Buy one, get one free - Wikipedia

   en.wikipedia.org/wiki/Buy_one,_get_one_free

   Buy one, get one free. " Buy one, get one free " or " two for the price of one " is a common form of sales promotion. Economist Alex Tabarrok has argued that the success of this promotion lies in the fact that consumers value the first unit significantly more than the second one. So compared to a seemingly equivalent "Half price off" promotion ...