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Reference.org
Seven-segment display
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<p>A seven-segment display is a <a href="/facts/Display_device/yX1Mypk0">display device</a> for <a href="/facts/Arabic_numerals/LryNhh26">Arabic numerals</a>, less complex than a device that can show more characters such as <a href="/facts/Dot_matrix_display/1PAS4Ix9">dot matrix displays</a>. Seven-segment displays are widely used in <a href="/facts/Digital_clock/1D1xwaob">digital clocks</a>, electronic meters, basic calculators, and other electronic devices that display numerical information. </p>