NPDGNeue Pellwormer Dampfschiffahrts GmbH(German: New Pellworm Steam Schiffahrts GmbH) NPDGNew Professionals Discussion Group(mailing list) NPDGNetwork Planning and Development Group(University of Houston, TX) NPDGNational PALS (Patient Advice and Liaison Services) Development Group(Department of Health; London, England, UK) NPDGNon-Profit Develop...