Advertising on all communication media; rental of advertising time and space on all communication media; preparation, insertion and dissemination of advertisements; dissemination of offers for real estate sales and rentals; information and consultancy regarding real estate sale and rental offers and requests, receipt and dissemination of real estate sale and rental advertisements, all these services carried out by all means and particularly via computer, telematic and/or electronic media; collection and systemization of information into computer databases.