Clinical Bioinformatics Ontology™ (CBO) - Existing medical vocabularies lack rich terms to describe findings generated by molecular diagnostic and cytogenetic techniques. Likewise, bioinformatics resources were not designed to support the needs of the clinical community. The Clinical Bioinformatics Ontology™ (CBO) was initiated to address these gaps. Key attributes of the CBO include: a) Controlled vocabulary – uniquely identified concepts, b) Machine readable – multiple formats, c) Semantic network / ontology – provides biological context to clinical findings, d) Curated resource – Consistent application of content creation methodology, quality control process, and e) Focused on current clinical practice – controlled scope. This site provides guest users with access to a subset of the CBO that includes all of the high level navigational concepts and a subset of the concepts associated with the cystic fibrosis gene (CFTR). Registered users can download the full ontology in multiple formats. This has been added to Biological Informatics Subject Tracer™ Information Blog.