ADAV is the first central purchaser of audiovisual services for cultural and educational nonprofit networks. It broadcasts its programs to cultural institutions and communities through a computer system designed with 4D technologies by system integrator Nagra, a consulting and engineering firm involved with audiovisual and communications. ADAV supplies some 10,000 customers – libraries, media centers, schools, overseas cultural centers and organizations – using three 4D applications covering catalogs, management and web.