I doubt that the Oracle v. Google case has any effect on the status of DDC especially since "AMERICAN DENTAL ASSOCIATION V. DELTA DENTAL PLANS ASSOCIATION", though not a SCOTUS case is a much more relevant precedent. https://caselaw.findlaw.com/us-7th-circuit/1233610.html > On Apr 26, 2021, at 12:05 PM, Eric Hellman <[log in to unmask]> wrote: > > Also don't forget that versions of the Dewey Decimal System published in 1925 and earlier are are now in the public domain, for example https://archive.org/details/deweydecimal11dewe (enjoy the spelling!) > > Eric >