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  2. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Chart of the Morse code 26 letters and 10 numerals [1]. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur [2]. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.

  3. 020 - Wikipedia

    en.wikipedia.org/wiki/020

    The 020 area code fully replaced older area codes for London on 22 April 2000, following multiple telephone number changes during the 1990s. [notes 1] As is the case for other codes in the UK, the 020 area code may also be used for services without any physical presence in the area, such as private networks or virtual numbering. [1]

  4. Coupon - Wikipedia

    en.wikipedia.org/wiki/Coupon

    Food stuff ration coupons types I–V for direct laborers and workers in Vietnam, 1976–1986. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product.

  5. History of the Conservative Party (UK) - Wikipedia

    en.wikipedia.org/wiki/History_of_the...

    In 1846 disaster struck the Conservatives when the party split over the repeal of the Corn Laws.Peel and most senior Conservatives favoured repeal, but they were opposed by backbench members representing farming and rural constituencies, led by Lord George Bentinck, Benjamin Disraeli, and Lord Stanley (later the Earl of Derby), who favoured protectionism.

  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. Lockheed SR-71 Blackbird - Wikipedia

    en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird

    On a typical mission, the SR-71 took off with only a partial fuel load to reduce stress on the brakes and tires during takeoff and also ensure it could successfully take off should one engine fail. [86] Within 20 seconds the aircraft traveled 4,500 feet (1,400 m), reached 240 miles per hour (390 km/h), and lifted off.

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