Providing information in the field of real estate by means of linking the web site to other web sites featuring real estate information; Providing information in the field of real estate via the Internet; Providing real estate listings and real estate information via the Internet; Real estate acquisition services; Real estate agencies; Real estate brokerage; Real estate consultation; Real estate investment; Real estate listing; Real estate management; Real estate management consultation; Real estate multiple listing services; Real estate rental services, namely, rental of residential housing; Real estate services, namely, rental of vacation homes, condominiums, cabins, and villas using pay per click advertising on a global computer network