What is the Bit List?

A free-to-access and open resource for digital preservation advocacy, the DPC's Global Bit List of Endangered Digital Species (or Bit List for short) is a community-sourced list of at-risk digital materials which is revised every two years. Entries to the list are nominated by the community, who are at the forefront of digital preservation efforts, and reviewed by international organizations which represent global expertise in the preservation of the listed digital species.

By compiling and maintaining the Bit List, the DPC aims to equip digital preservation practitioners with independent evidence that digital materials are critically endangered, and that action is required, in order to support their targeted advocacy efforts.


Risk Classifications

Current entries were last nominated to the Bit List in 2023. Entries are grouped by risk ‘classification’ and digital ‘species.’ Click on each of the risk classifications to see the entries for each category, browse the Bit List by digital species and click each entry for the full report.


Species Categories

  • Nominate at-risk digital materials now!

    The Global Bit List of Endangered Digital Species is open for nominations of at-risk material from the digital preservation community all year round.

    Submit a nomination now for consideration as part of the next review cycle for the Bit List 2025.


    If you are unable to access the Google form to nominate your at-risk digital materials or you would like to prepare your information in advance,

    please download and complete the Excel version of the form.

    Completed Excel forms may be sent to This email address is being protected from spambots. You need JavaScript enabled to view it..

Access previous versions of and introductions to the Bit List, now superceded:

  • Introduction to the Bit List of Digitally Endangered Species 2021


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