The Internet Archive at archive.org is the largest free digital library in the world. It holds millions of books, audio recordings, films, software programs, and archived web pages. For Holocaust research, the Internet Archive is useful as a backup source for older books that are out of print but out of copyright, for archived versions of historical websites, and for film and audio material that has fallen into the public domain.
The archive includes scanned editions of many of the foundational works of Holocaust history, including older editions of Raul Hilberg’s The Destruction of the European Jews, the major early survivor memoirs, and historical documents that have been donated by individual researchers. Many of these books can be read online directly through the archive’s reader, or downloaded as PDFs.
The Wayback Machine, part of the Internet Archive, allows the user to view archived versions of web pages. This is particularly useful for accessing earlier versions of Holocaust resources that have since been taken down, moved, or substantially revised.
Website: archive.org
Wayback Machine: web.archive.org