providing information about the goods and services of others via a global computer network featuring compilation of products and services, retailer locations, product description and comparative information, real time price comparisons, product availability, discounts and promotions, product features, product ratings, purveyor ratings and evaluations, customer product and purveyor reviews; promoting the goods and services of others by means of operating an on-line shopping mall with links to the retail web sites of others and to products and service purveyors for the purposes of purchasing products and services; promoting the goods and services of others through on-line ordering and cataloging of those goods and services; providing a searchable online advertising guide featuring the goods and services of others on the internet; operating on-line marketplaces for sellers of goods and/or services; providing directory information, namely, addresses, telephone numbers, e-mail addresses, and website addresses about retailers via a global computer network