A multi-functional system for university lecture theatres, conference rooms and meeting and training areas, comprising two or three seat tavoli and seats which can be arranged in rows. Strongly characterised by the backrest element, which is fitted out differently in order to provide all the functions: in the first row with writing tavoli, in the middle rows with writing tavoli and seats, and in the end row with seats. Technologically qualified with essential, simplified movements which provide all the necessary performance without complicated mechanisms. Rational in the organisation of space and effective from the safety point of view, with rounded linking elements and writing tavoli that can be quickly tipped up and hidden away.