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  2. Electric gate - Wikipedia

    en.wikipedia.org/wiki/Electric_gate

    At the end of the 19th century, electric gates were also used at horse racing tracks. [5] The first commercial electric gate systems were hydraulic and designed for reliability and ease of use. The cost of the hydraulic systems however meant that other companies started producing more affordable electromechanical alternatives.

  3. List of 4000-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_4000-series...

    The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...

  4. Logic gate - Wikipedia

    en.wikipedia.org/wiki/Logic_gate

    A logic circuit diagram for a 4-bit carry lookahead binary adder design using only the AND, OR, and XOR logic gates.. A logic gate is a device that performs a Boolean function, a logical operation performed on one or more binary inputs that produces a single binary output.

  5. List of quantum logic gates - Wikipedia

    en.wikipedia.org/wiki/List_of_quantum_logic_gates

    The Fredkin gate (also CSWAP or CS gate), named after Edward Fredkin, is a 3-bit gate that performs a controlled swap. It is universal for classical computation. It has the useful property that the numbers of 0s and 1s are conserved throughout, which in the billiard ball model means the same number of balls are output as input.

  6. Starting gate - Wikipedia

    en.wikipedia.org/wiki/Starting_gate

    Hastings Racecourse's starting gate, 2009. Start of the Belmont Stakes 2014 Horses leaving barrier stalls at the start of a Hong Kong Derby.. A starting gate, also called a starting barrier or starting stalls, is a machine used to ensure a fair start to in horse racing and dog racing.

  7. California - Wikipedia

    en.wikipedia.org/wiki/California

    California has the nation's largest economy with a gross state product of $4.132 trillion as of Q3 2024. [15] It is the world's largest sub-national economy, and would by most estimations rank 5th globally by nominal GDP. [16] [17] The state also leads the nation in agricultural output, [18] [19] [20] led by its production of dairy, almonds ...

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