This definition appears somewhat frequently
See other definitions of PSD
Samples in periodicals archive:
PSP. The revolution in payment is now possible in Europe with the European Payment Service Directive and the Eletronic Money Institution regulation.
The Payment Services Directive  (PSD) is an EU Directive, administered by the European Commission (Directorate General Internal Market) to regulate payment...
07-24-2013 PRESS RELEASE: Payment Service Directive II: Access to Account will boost innovation in payment landscape