The Attestation of Compliance for Self Assessment Questionnaires B, C, and D asks what Payment Application is in use, and the Payment Application Version - what is meant by a ?payment application??
A payment application is a commercial application that stores, processes, or transmits cardholder data as part of authorization or settlement. A common example of a payment application is the software running on a point of sale (POS) terminal. To obtain details about a payment application on a POS, please contact the point of sale terminal provider or your acquiring bank (merchant bank).