Classified real estate listings of apartment rentals and housing rentals; Commercial and residential real estate agency services; Providing a database of information about residential real estate listings in different neighborhoods and communities; Providing a database of residential real estate listings within neighborhoods and communities specifically identified by users; Providing an Internet website portal offering information in the fields of real estate concerning the purchase and sale of new and resale homes and condos; 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; Providing real estate listings via the Internet; Real estate brokerage; Real estate financing services; Real estate investment services; Real estate listing; Real estate listing services for housing rentals and apartment rentals; Real estate multiple listing services; Real estate rental services, namely, rental of residential housing; Real estate services in the form of providing physical access to available properties via a remote call-in locking device; Real estate services, namely, rental of short-term furnished apartments; Real estate services, namely, rental of vacation homes; Real estate services, namely, rental of vacation homes, condominiums, cabins, and villas using pay per click advertising on a global computer network; Real estate services, namely, rental, brokerage, leasing and management of commercial property, offices and office space; Real estate services, namely, vacation home rental management services; Residential real estate agency services