Voluminous writings exception

Overview
The federal voluminous writings exception provides that where the original writings, recordings, or photographs are so voluminous that it would be impractical to produce them in court, a summary may be admitted instead. However, the originals must have been made available to the defendant for examination and copying, at a reasonable time and location. It must also be shown that the material was prepared in summary form by a competent individual.

Source

 * Computer Crime: Legislative Resource Manual, at 21.