IT is no longer a luxury reserved for specialists: it is now at the heart of all human activities, from the economy to education, from culture to administration. In a world where everything is becoming digital, mastering IT has become a real passport to the future. In a world where everything is becoming digitalized, mastering IT has become a real passport to the future. This third volume in the "Informatique pour tous" collection guides 3rd year Business and Management students in the acquisition of concrete, directly applicable skills. Designed to be practical, progressive and adapted to Congolese realities, this manual transforms learning into a useful, motivating and professional experience.with the expertise of its author - an entrepreneur and recognized IT specialist, author of the "TIC pour Tous" collection - students explore four essential chapters: - Data archiving - Data manipulation - Mobilization of finances - Participation in financial activities. Using software such as Excel and Banana 9, students are introduced to computerized accounting and discover how to turn digital skills into professional assets.