A payment gateway facilitates the exchange of information between a payment portal
(includes website, interactive voice response service or mobile phones) and the
acquiring bank which processes credit card transactions. The service enables credit
card payments for e-businesses, online retailers, bricks and clicks, and traditional
brick-and-mortar businesses. It works securely to transfer sensitive credit card
information from an online payment form to the payment processor. A payment
gateway can be integrated with any payment device, which is usually an e-commerce
shopping cart such as Shopify or Magento.
An ESL is a system used by retailers to display the price of the product on the shelf and the information related to it. An ESL is usually attached to the front edge of a retail shelf. It uses LCD or similar technology for displaying the product information.The product price displayed on an ESL is automatically updated whenever the price is changed. This change can be made with the help of a communication networkbased on infrared, radio frequency, or visible light technology.