Used ROGET.CAT Roget Categorization Dictionary data (1911 edition, but with some modern enhancements) in Roget.zip obtained from kovcomp.co.uk to create a filesystem hierarchical directory structure, dynamically traversed and presented using javascript code (deployed with node.js). This is based on the d3.js ontology viewer as used on the Computer Science Ontology portal at cso.kmi.open.ac.uk