Electronic advertising display units with multi-networking (TCP/IP) capabilities; software for the collection, processing, and analysis of business data concerning product inventory, marketing and advertising of consumer products, pricing of consumer products, sale of consumer products, and audience measurement; software for tracking inventory, namely, sales volume tracking for others; software for collecting, analyzing, and providing information about consumer products in the field of product inventory, marketing and advertising of consumer products, pricing of consumer products, sale of consumer products, and audience measurement; software for providing product sales information at the point of sale; machine learning algorithms for the collection, processing, and analysis of business data concerning product inventory, marketing and advertising of consumer products, pricing of consumer products, sale of consumer products, and audience measurement; machine learning algorithms for tracking inventory, namely, sales volume tracking for others; machine learning algorithms for collecting, analyzing, and providing information about consumer products in the field of product inventory, marketing and advertising of consumer products, pricing of consumer products, sale of consumer products, and audience measurement; machine learning algorithms for providing product sales information at the point of sale