Real estate agent services; Real estate acquisition services; Real estate agency services for the purchase or sales of buildings; Real estate brokerage; Real estate consultation; Real estate listing; Real estate management; Real estate multiple listing services; Real estate valuations; Commercial and residential real estate agency services; Online real estate brokerage rendered in virtual environments; Providing real estate listings and real estate information via the Internet; Providing a database of information about residential real estate listings in different neighborhoods and communities; 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