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  2. 1976 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/1976_United_States...

    The 1976 United States presidential election was the 48th quadrennial presidential election, held on Tuesday, November 2, 1976. The Democratic nominee, former Georgia governor Jimmy Carter, narrowly defeated incumbent Republican President Gerald Ford.

  3. Christopher Columbus - Wikipedia

    en.wikipedia.org/wiki/Christopher_Columbus

    Christopher Columbus [b] (/ k ə ˈ l ʌ m b ə s /; [2] between 25 August and 31 October 1451 – 20 May 1506) was an Italian [3] [c] explorer and navigator from the Republic of Genoa who completed four Spanish-based voyages across the Atlantic Ocean sponsored by the Catholic Monarchs, opening the way for the widespread European exploration and colonization of the Americas.

  4. Manchester code - Wikipedia

    en.wikipedia.org/wiki/Manchester_code

    Manchester coding is a special case of binary phase-shift keying (BPSK), where the data controls the phase of a square wave carrier whose frequency is the data rate. . Manchester code ensures frequent line voltage transitions, directly proportional to the clock rate; this helps clock

  5. Barcode - Wikipedia

    en.wikipedia.org/wiki/Barcode

    A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and ...

  6. Halley's Comet - Wikipedia

    en.wikipedia.org/wiki/Halley's_Comet

    This suggested that only 10% of Halley's surface was active, and that large portions of it were coated in a layer of dark dust that retained heat. [67] Together, these observations suggested that Halley was in fact predominantly composed of non-volatile materials, and thus more closely resembled a "snowy dirtball" than a "dirty snowball". [10] [70]

  7. Smallpox - Wikipedia

    en.wikipedia.org/wiki/Smallpox

    Smallpox was an infectious disease caused by variola virus (often called smallpox virus), which belongs to the genus Orthopoxvirus. [7] [11] The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980, [10] making smallpox the only human disease to have been eradicated to date.

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