1. Pittsburgh Bridges: Bridges database that has original and numeric-discretized datasets
2. Flags: From Collins Gem Guide to Flags, 1986
3. Teaching Assistant Evaluation: The data consist of evaluations of teaching performance; scores are "low", "medium", or "high"
4. Meta-data: Meta-Data was used in order to give advice about which classification method is appropriate for a particular dataset (taken from results of Statlog project).