Definition: The OJD is the reference organization in the expertise of counting print and digital media. Created in 1922, this association of law 1901 has for object: the diffusion, the distribution and the counting of the newspapers, periodicals and other supports of publicity. It regularly publicizes the results of its measurements through the publication of ratings on the audience of print and digital media since 2011 (websites and mobile applications). The data are for example: the number of useful prints, the total paid circulation, details by type of circulation (single issue sales, reduced price sales, individual subscription, collective subscription, free copy, digital distribution, etc.), by location (mainland France, France, abroad, department, etc.). Note: the data sources are the publishers who are members of the OJD.