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There are 3 types of pixels (There always are, aren’t there?) : Cascading Style Sheet Pixels (CSS) Pixels. Device Pixels are also termed as number of Dots Per Inch (DPI) or Pixels per Inch. The higher the number, the smaller the size of the pixels, so graphics are perceived as more crisp and less pixelated. DPI is more common place though and is a fairly popular term in gaming community (All Gamers from this side of the world)