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OpenCyc is the open source version of the Cyc(r) technology, the world's largest and most complete general knowledge base and reasoning engine. A new release with even more content, better performance, and improved reliability will be up shortly.

Browse Files for OpenCyc

File/Folder Name  Platform Size Date ↓ Downloads Notes/Subscribe
Newest Files
opencyc-2.0-linux.tgz linux bsd solaris 220.8 MB 2009-08-26 732
opencyc-2.0-win32.zip 221.9 MB 2009-08-26 1,867
opencyc-2.0-win64.zip 221.9 MB 2009-08-26 257
All Files Subscribe
OpenCyc 2.0 664.6 MB 2009-08-26 2,856 Subscribe Folder view
opencyc-2.0-linux.tgz linux bsd solaris 220.8 MB 2009-08-26 732
opencyc-2.0-win32.zip 221.9 MB 2009-08-26 1,867
opencyc-2.0-win64.zip 221.9 MB 2009-08-26 257
TPTP Challenge Problem Set 213.8 MB 2007-09-06 3,939 Subscribe Folder view
Cyc TPTP v1.0 213.8 MB 2007-09-06 3,939 Subscribe Folder view
tptp_scaling_challenge_problem_set.tgz 112.4 MB 2007-09-06 1,621 Release Notes
tptp_elaboration_challenge_problem_set.tgz 101.5 MB 2007-09-06 2,318 Release Notes