Computer services, namely, hosting an interactive web site that allows users to search for, buy, and sell books; Hosting an on-line community web site featuring new and used books; Providing a web site featuring technology that enables users to search for, buy, advertise, and sell books; Providing a website featuring a search engine for the purchase and sale of books; Providing a website featuring on-line non-downloadable software that enables users to search for, buy, advertise, and sell books; Providing a website featuring technology that enables users to search for, buy, and sell books; Providing a website that gives computer users the ability to search for, buy, advertise, and sell books; Providing an interactive website featuring technology that allows users to search for, buy, advertise, and sell books; User authentication services using technology for e-commerce transactions