http://www.cyc.com The CYC project was started at the Univ. of Texas (at Austin?) by Dr. Doug Lenat in the 1980s. The goal of the project was to let human beings teach an artificially intelligent program facts about the world and the relationships we understand to exist between different facts, objects in the world, and discrete and abstract concepts we humans take for granted -- given our respective level of formal education and real world experiences. Since the 1990s (or early 2000s?) the CYC project has been hosted and managed by Dr. Lenat's company, Cycorp, also located in Texas (USA). The end-result of this human instruction of the AI program has been an ever expanding "semantic network" of words, ideas, names of objects, names of discrete and abstract concepts, and their inter-relationships. This "semantic network" has been available for free access by other researchers in AI, by academics in general, by students of all ages, and by the general public world-wide by means of a "client program" which the end-user must first download to and install on their personal computer. The CYC "client program" then lets the end-user access the CYC database in Texas which stores the ever expanding "semantic network".