A DCHP unit with a Stirling engine, a burner and a supplementary burner. The method includes receiving an authorization request message associated with a transaction conducted using a portable consumer device. A text entry may be received from a user, such as in an electronic document. A WSDL file, web service interface code, and web service implementation code are automatically, i. The present invention further relates to various processes for providing such systems, counter members thereof, and electric andor magnetic shields therefor.