On-line advertising on a computer network giving information relating to educational institutions and courses, advertising, updating of advertising material, dissemination of advertising matter, rental of advertising space, cost price analysis, business appraisals, compilation of business information, compilation of information into computer databases, systemization of information into computer databases, data search in computer files (for others), business information, business inquiries, marketing research, business research, business statistical information services, collection of information relating to advertising