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  2. 10–20 system (EEG) - Wikipedia

    en.wikipedia.org/wiki/10–20_system_(EEG)

    1020 system (EEG) The 1020 system or International 1020 system is an internationally recognized method to describe and apply the location of scalp electrodes in the context of an EEG exam, polysomnograph sleep study, or voluntary lab research. This method was developed to maintain standardized testing methods ensuring that a subject's ...

  3. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    For example, in the NYPD system, Code 10-13 means "Officer needs help," whereas in the APCO system "Officer needs help" is Code 10-33. The New Zealand reality television show Ten 7 Aotearoa (formerly Police Ten 7) takes its name from the New Zealand Police ten-code 10-7, which means "Unit has arrived at job". [citation needed]

  4. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    A pie chart showing the percentage by web browser visiting Wikimedia sites (April 2009 to 2012) In mathematics, a percentage (from Latin per centum 'by a hundred') is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign (%), [1] although the abbreviations pct., pct, and sometimes pc are also used. [2]

  5. Gross domestic product - Wikipedia

    en.wikipedia.org/wiki/Gross_domestic_product

    v. t. e. Gross Domestic Product ( GDP) is a monetary measure of the market value [2] of all the final goods and services produced and rendered in a specific time period by a country [3] or countries. [4] [5] [6] GDP is often used to measure the economic health of a country or region. [3] Definitions of GDP are maintained by several national and ...

  6. 2000 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/2000_United_States...

    The 2000 United States presidential election was the 54th quadrennial presidential election, held on Tuesday, November 7, 2000. Republican Texas Governor George W. Bush, the eldest son of George H. W. Bush, narrowly defeated incumbent Democratic Vice President Al Gore. It was the fourth of five U.S. presidential elections, and the first since ...

  7. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    Grade (slope) The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line refers to the tangent of the angle of that surface to the horizontal. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper ...