Price Comparison Shopping Engine typically enable shoppers to use "search" features to find specific models, brands or items. Online customers must have access to the Internet and a valid method of payment in order to complete a transaction, such as a credit card, an Interac-enabled debit card, or a service such as PayPal. For physical products (e.g., paperback books or clothes), the e-tailer ships the products to the customer; for digital products, such as digital audio files of songs or software, the e-tailer typically sends the file to the customer over the Internet . SHOPnROAR is a next generation artificially intelligent comparative shopping engine where consumers can search for and compare millions of Products for the ultimate comparative shopping experience. Price Comparison Shopping Engine is an activity in which a customer browses the available goods or services presented by one or more retailers with the potential intent to purchase a suitable selection of them. A typology of shopper types has been developed by scholars which identifies one group of shoppers as recreational shoppers,that is, those who enjoy Price Comparison Shopping Engine and view it as a leisure activity.