Portico is one of the most comprehensive digital preservation archives; we hold more content than others and have extensive knowledge about the content we preserve, including  an understanding of component file types and formats. The archive is growing daily, and the information below is regularly updated.

participating publishers

on behalf of over 2,000 societies and associations

participating libraries
trigger events
committed ejournal titles
committed ebook titles
committed digital collections

Preserved content

Preserved archival units (articles, books, etc.) 135,050,386
Preserved ejournal titles 36,150
Preserved ebook titles 1,597,342
Preserved files 2,247,266,831
Preserved images 1,321,801,861
Preserved repository-created archival files 285,811,991
Preserved supplied text files 476,097,546
Preserved application-specific files 32,148,014
Preserved multi-file packages 17,012,757
Preserved video files 239,859
Preserved audio files 8,336
Preserved executable files 100