"tpi." YourDictionary, n.d. Web. 10 June 2018. <http://www.yourdictionary.com/tpi>.
tpi. (n.d.). Retrieved June 10th, 2018, from http://www.yourdictionary.com/tpi
(Tracks Per Inch) The measurement of the density of the storage channels on a disk or tape. Track density on magnetic disks has reached 125,000 tpi (125 Ktpi). See bpi, areal density and track pitch.