A Posiva report represents Posiva's view of the results and conclusions presented in the report. The reports are part of the backbone of Posiva's research work. A few dozen Posiva reports are published each year, mostly in English. In addition to an internal identification number, each Posiva report is given an ISBN number to make it easier to find the publication and process it in information systems. At the end of each Posiva report, there is a list of previously published Posiva reports.