Business management and organisation consultancy, business investigations and efficiency experts, marketing studies, opinion polling, business information; advertising, advertising agencies services, development and dissemination of advertising matter, publicity columns preparation, development of advertising material and documentation, direct mail and documentation advertising, rental of advertising space; publicity material renting, publication of publicity texts; newspaper subscriptions services, exhibitions for commercial or advertising purposes services; computerised file management; sales promotions for others, namely by electronic means of telecommunication