Government documents from microfiche are coming to archive.org based on the combined efforts of the Internet Archive, Stanford University Libraries, and other library partners. The resulting files will be available for free public access to enable new analysis and access techniques. 

Microfiche cards, which contain miniaturized thumbnails of the publication’s pages, are starting to be digitized and matched to catalog records by the Internet Archive. Once in a digital format and preserved on archive.org, these documents will be searchable and downloadable by anyone with an Internet connection, since U.S. government publications are in the public domain.

https://blog.archive.org/2022/03/15/new-project-will-unlock-access-to-government-publications-on-microfiche/