略語大辞典 [C] 24 BPI bit per inch インチ当りのビット数. 磁気記録密度の単位.bit per inch; a unit of storage density of amagnetic tape; e.g. 800-1600 BPI; ref. FCI(flux change per inch), TPI(track perinch); [C:E]. 丸善「略語大辞典」JLogosID : 11867788