The Linux variant has slightly reduced functionality compared to its Windows predecessor, although it still retains key functionality: intercepting declined (magnetic swipe) transactions messages for a predefined list of card holder account numbers and then authorizing the transaction with a random amount of funds in the currency of Turkish Lira. The standard, known as "Financial Transaction Card-Originated Messages — Interchange Message Specifications", details the format and standard for debit and credit card transactions: actions such as checking a balance, withdrawing cash from an ATM or making a purchase from a Point of Sale terminal at a retail store.