Non-subscriber Shared Mail program in the greater Washington Market Area. In-home day is Thursday/Friday with approx. 50% on Thursday. Home delivery in-paper preprint zones are zip based within the NDM. Single copy within the NDM are separate zip-clusters. Within the NMD advertisers have the option of purchasing Home Delivery Zones or Single Copy Zones. Outside the NDM the zones are zip-clusters that include both Home Delivery and Single Copy.