Is a commercial software vendor who sells software for use in the United States, subject to, or legally required to implement PCI-DSS if their software includes a feature which will allow the collection and storage of credit card information, but which does not do payment processing itself as part of the software's features?
Said software vendor would NOT be processing payment using this software but simply encrypting and storing the credit card information for the purposes of simplification of manual payment processing using software from another vendor. That is, this hypothetical software vendor is simply producing software which can communicate to other payment systems, but which is not a software based payment system itself. (For instance, perhaps communicates to Digital River or other online payment processing systems, and stores credit card information in a database, in encrypted form.)