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== Science and engineering == * [[Background extinction rate]] * [[Background independence]], a condition in theoretical physics * [[Background noise]] * [[Background radiation]], the natural radiation that is always present in a location ** [[Background (astronomy)]], small amounts of light coming from otherwise dark parts of the sky ** [[Cosmic background (disambiguation)]] ** [[Gravitational wave background]] ** [[X-ray background]] * [[Background process]], software that is running but not being displayed * [[String background]] * [[Computer wallpaper]] * bKGD, an [[PNG#Ancillary chunks|ancillary chunk]] in the PNG file format
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