ABA Track - Sometimes used to refer to the ANSI/ISO Track #2. Typically includes primary account number, expiration date and other account information. Active Label® - A patented, removable/reusable plastic label is pre-applied to a plastic card and then personalized (imaged). At issuance, the label is removed and applied to an application or security document to maintain efficient and accurate controls of all issued cards. Algorithm - The formula used to calculate the check digit. ATM - Automatic Teller Machine.