ul>
<li><a href="technology/whatiscyc_dir/whatsincyc">The Cyc Knowledge Base</a>
<li><a href="technology/whatiscyc_dir/howdoescycreason">The Cyc Inference Engine</a>
<li><a href="technology/whatiscyc_dir/howdoescycreason#cycl">The CycL Representation Language</a>
<li><a href="cyc/cycrandd/areasofrandd_dir/nlu">The Natural Language Processing Subsystem</a>
<li><a href="technology/whatiscyc_dir/whatsincyc#sib">Cyc Semantic Integration Bus</a>
<li><a href="technology/whatiscyc_dir/whatsincyc#interface">Cyc Dev