Providing direct marketing services for others, namely, client's customer list management, database management; data analysis services, namely analysis of product, average order size, order value and discount redemption, by customer, by retail store location, by frequency of purchases, by specific promotion, postal mailing list address correction services; duplicate detection of name and address data, merge and purge services for commercial or business purposes, for identifying duplicate name and address records, selecting one surviving record traditional definition, merging name and address records together to purge duplicates, using N/A algorithm techniques for the retail industry only; interactive marketing consulting services; promoting the sale of articles and services for third parties by the facilitation of advertising message distribution, postal presortation, namely, processing mailing files for postal discounts and mailing list label creation