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near field communications tags for identifying, authenticating and tracing collectible coins; downloadable computer software application for use in transmitting information regarding collectible coins, digitally authenticating coins, tracing the provenance of coins, detecting counterfeit collectible coins and collectible coins that have been tampered with, mapping the occurrence of counterfeit coins, and targeted marketing to numismatists; downloadable computer software ecommerce platform for sales of collectible coins, administering loyalty programs for vendors and purchasers of collectible coins, managing inventory and portfolio valuation for dealers and collectors of collectible coins, and providing alerts to collectors regarding collectible coins desired by dealers; downloadable computer software social media platform for use by numismatists to facilitate electronic communication between individuals provided via the Internet