Magnetic stripe
Ferromagnetic strip on the card reverse encoding account data on three tracks per ISO/IEC 7811. Track 1 alphanumeric (79 chars), Track 2 numeric (40 chars, the primary track), Track 3 rarely used today.
Ferromagnetic strip on the card reverse encoding account data on three tracks per ISO/IEC 7811. Track 1 alphanumeric (79 chars), Track 2 numeric (40 chars, the primary track), Track 3 rarely used today.
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