To search for non-OU digitized books through OU Libraries databases see: Search for Books Using Worldcat & Online Sites
To learn about Digital Collections and other online resources beyond OU, see: Online Resources Beyond OU (for HSTM).
To learn about online sites for Primary Sources see: History: Primary Sources - Internet (by Laurie Scrivener)
To learn about periodicals see Newspapers & Magazines (by Kristal Boulden)
Digitized items from the History of Science and other 5th floor Special Collections are included in past exhibits, accessible online (in some cases, only select images from books are available):