A repository for digital collections. Items in the public domain (works published before 1923) are freely accessible online.
A digital library of Internet sites and other cultural artifacts in digital form. Includes digitized books, periodicals, media, and more.
To digitize is "to change (information or pictures) to digital form." Many libraries, archives, special collections, museums and other cultural institutions are digitizing historical content from their collections to both preserve the material and provide greater access to it online.
Some of this content is available through individual collection websites that you can find online through strategic Google searches. You can also explore this content through digitization portals such as the Digital Public Library of America (DPLA), Europeana, and state-level portals, such as DigitalNC. These portals attempt to offer a single-search to the content from the many digitization collections online.