Bit density is a measure of the number of bits encoded on magnetic tape per unit of distance (millimeter or inch). On banking and financial cards encoded to ISO standards, track 2 is encoded at 2.95 bits per millimeter (75 bits per inch); tracks 1 and 3 are 8.27 bits per millimeter (210 bits per inch). character- A character is one alphabetic or numeric symbol that is formed by joining individual bits to form intelligible data.
The number of bits per unit length recorded on a magnetic medium. On ISO standard identification cards track 1 and track 3 are recorded at 8.3 bpmm and track 2 at 3 bpmm
Number of bits that can be placed, per unit area or volume, on a storage medium (eg bits per inch of magnetic tape).
Expressed as bits per inch (BPI), the number of bits that can be written onto one inch of track on a disk surface.
Bits per unit length, are or volume of the recording medium; for example, the number of bits per square centimetre of magnetic tape.
Bits Per Inch. The number of bits that can be written along one inch of a track.
Expressed as bits-per-inch (BPI), bit density defines how many bits can be written onto one inch of a disc or tape track.