Advertising and marketing; Leasing of office equipment; Providing a web site which features advertisements for the goods and services of others on a global computer network; Providing and rental of advertising space on the internet; Providing on-line directory information services also featuring hyperlinks to other web sites; Providing space at a web site for the advertisement of the goods and services of others; Real estate marketing services in the field of renting of apartments, houses commercial real estate and condominium; Rental of advertising space on web sites