System and method for electronic correlated sales and advertising

A product identification and display system comprising:

• a point of sale computer;
• a universal serial bus/personal system/2 bypass connected to the point of sale computer configured to split a data output from a bar code reader connected through the universal serial bus/personal system/2 bypass to the point-of-sale computer, the splitting of the data output splitting the data output from the bar code reader into two identical signals, a first of the two identical signals going to the point of sale computer;
• an electronic display comprising a computer processor, connected through the universal serial bus/personal system/2 bypass to the bar code reader, a second of the two identical signals from the universal serial bus/personal system/2 bypass going to the electronic display, the electronic display being isolated from communication with the point of sale computer;
• a database comprising product information, data correlating products in the database, and visual representations of product warning information, the database in electronic communication with the electronic display, and isolated from communication with the point of sale computer;
• a memory connected to the computer processor of the electronic display, the memory storing instructions that, when executed by the processor, causes the processor to:
• identify, using the data collected by the barcode reader, at least one product;
• retrieve, from the database, information relating to a second product correlated to the first product, the computer processor of the electronic display operable to cause the electronic display to present the information relating to the second product on the electronic display, so as to dynamically present customized information to a customer based on the first product, allowing customized advertising directed to the customer presented on the electronic display;
• and
• retrieve, from the database, a product warning information relating to the first product and operable to cause the electronic display to present the product warning information on the electronic display, so as to dynamically present customized product warning information to the customer based on the first product, allowing customized information to be directed to the customer presented on the electronic display;
• the system being operable without a modification of the point of sale computer by the isolation of the electronic display and the database from the point of sale computer, thereby allowing the checkout and point of sale system to be operable on an existing point of sale computer without modification of the existing point of sale computer.