The Database of Individual Seismogenic Sources (DISS), the original software and all related texts and elaborations were prepared by researchers of the Istituto Nazionale di Geofisica e Vulcanologia. The Database includes a large amount of original and published material on the main seismogenic sources of Italy together with background geographical, seismological, geological, and tectonic information, and is freely available to all interested parties. The Database was designed as a "work in progress", and as such, it is open to later additions and improvements. For these reasons and due to its intrinsic nature, the Database cannot be guaranteed to be complete, accurate and updated in any part, and will be subjected to successive revisions. Although the Istituto Nazionale di Geofisica e Vulcanologia makes every effort to supply the best available information on seismogenic processes, no warranty, expressed or implied, is provided as to the accuracy and reliability of all the data supplied in the Database. Users are cautioned to consider carefully the provisional nature of the data and information before using it for decisions that concern personal or public safety or in relation to business involving substantial financial or operational consequences. Conclusions drawn from this Database, or actions undertaken on the basis of its contents, are the sole responsibility of the user.