The Internet Archive hosts several versions of the OED, ranging from the original 19th-century "fascicles" to the complete 1933 reissue and later editions.
Having the OED available as a PDF archive means the "DNA of English" is now portable. Whether you are a student looking for a specific Victorian usage or a casual reader curious about the first recorded instance of a slang term, these archives transform a 20-volume heavyweight into a searchable, accessible digital companion. oxford english dictionary pdf archive.org