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FreeHAL
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<p>FreeHAL was a <a href="/facts/Volunteer_computing/YkXGa3N8">volunteer computing</a> project to build a self-learning <a href="/facts/Chatterbot/kASkMjs7">chatbot</a>. This project is no longer active. </p><p>Originally, the program was called <i>JEliza</i> referring to the chatbot <a href="/facts/ELIZA/e2Frdz7f">ELIZA</a> by <a href="/facts/Joseph_Weizenbaum/Sy2f7I4h">Joseph Weizenbaum</a>. The <i>J</i> stood for <a href="/facts/Java_/9ScgFyAL">Java</a> because JEliza has first been programmed in Java. In May 2008, the program has been renamed to <i>FreeHAL</i> because the programming language has changed. The name is related to the computer in the film <i><a href="/facts/2001:_A_Space_Odyssey_(film)/yUhFQY8W">2001: A Space Odyssey</a></i>. </p><p>FreeHAL uses a <a href="/facts/Semantic_network/mt7FlP53">semantic network</a> and technologies like <a href="/facts/Pattern_recognition/o1s38opj">pattern recognition</a>, <a href="/facts/Stemming/lqtKp4X7">stemming</a>, part of speech databases and <a href="/facts/Hidden_Markov_Model/ur1zTAhP">Hidden Markov Models</a> in order to imitate a human behaviour. FreeHAL learns autonomously. While communicating by keyboard, the program extends its database. Currently, English and German are supported. </p><p>By using the <a href="/facts/BOINC/RPaqqojG">BOINC</a> platform, new semantic networks for the program are built. FreeHAL@home appears to have terminated operations. </p>