The High Performance Knowledge Bases (HPKB) was a DARPA research program to advance the technology of how computers acquire, represent and manipulate knowledge. The successor of the HPKB project was the Rapid Knowledge Formation (RKF) project. The primary results of the HPKB project was to focus further research on the Knowledge acquisition bottleneck problem. HPKB was divided programmatically into three groups: Integrators Technology developers Challenge problem developers See also Knowledge base Cyc - commercial knowledge base OpenCyc - Open Source version of Cyc Electronic Directory Research (EDR) - Japanese large knowledge base effort Project Halo - Ultimate successor project Rapid Knowledge Formation (RKF)- follow-on project SUMO - Suggested Upper Merged Ontology Wikipedia - example of large knowledge base that is not yet semantically parsable WordNet - a semantic network of words, terms used in the English language External links DARPA HPKB Home Page Cohen,P., Schrag, R., Jones, E., Pease, A., Lin, A., Starr, B., Gunning, D. and Burke, M. DARPA High-Performance Knowledge Bases Project AI Magazine Volume 19 Number 4 (1998) References Web Intelligence: First Asia-Pacific Conference, Wi 2001, Maebashi City, Japan, October 23–26, by N Zhong, Y Yao, J Liu DARPA