Cyc

Original author(s)Douglas Lenat
Developer(s)Cycorp, Inc.
Initial release1984; 40 years ago (1984)
Stable release
6.1 / 27 November 2017; 6 years ago (2017-11-27)
Written inLisp, CycL, SubL
TypeKnowledge representation language and inference engine
Websitewww.cyc.com

Cyc (pronounced /ˈsk/ SYKE) is a long-term artificial intelligence project that aims to assemble a comprehensive ontology and knowledge base that spans the basic concepts and rules about how the world works. Hoping to capture common sense knowledge, Cyc focuses on implicit knowledge. The project began in July 1984 at MCC and was developed later by the Cycorp company.

The name "Cyc" (from "encyclopedia") is a registered trademark owned by Cycorp. CycL has a publicly released specification, and dozens of HL modules were described in Lenat and Guha's textbook,[1] but the Cyc inference engine code and the full list of HL modules are Cycorp-proprietary.[2]

  1. ^ Lenat, Douglas B.; Guha, R. V. (1989). Building Large Knowledge-Based Systems; Representation and Inference in the Cyc Project (1st ed.). Boston, MA, USA: Addison-Wesley Longman Publishing Co., Inc. ISBN 978-0201517521.
  2. ^ Lenat, Douglas. "Hal's Legacy: 2001's Computer as Dream and Reality. From 2001 to 2001: Common Sense and the Mind of HAL" (PDF). Cycorp, Inc. Archived (PDF) from the original on 2019-12-09. Retrieved 2006-09-26.