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bpi. (n.d.). Retrieved December 06th, 2018, from https://www.yourdictionary.com/bpi
bpi - Computer Definition
(Bits Per Inch) The measurement of the number of bits stored in one linear inch of a track (storage channel) on a disk or tape. Bit density on magnetic disks has reached 800,000 bpi (800 Kbpi). See tpi, areal density and magnetic disk.