"bpi." YourDictionary, n.d. Web. 21 January 2019. <https://www.yourdictionary.com/BPI>.
bpi. (n.d.). Retrieved January 21st, 2019, 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.