| delphigroup.com | Delphi Group Taxonomy and Content Classification Report |
| freepint.com | Taxonomies Are What? |
| nus.edu.sg | MeURLin: URL-based Classification of Web Pages |
| controlledvocabulary.com | Controlled Vocabulary |
| encyclozine.com | EncycloZine: Content Classification Schemes |
| berkeley.edu | Flamenco Project |
| content-wire.com | Online Taxonomies: The Next Shift for Information Science |
| classification-society.org | International Federation of Classification Societies |
| argus-acia.com | Organizational Theory Bibliography |
| snowfox.com | Snowfox |
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