1. Car Evaluation: Derived from simple hierarchical decision model, this database may be useful for testing constructive induction and structure discovery methods.
2. Chess (King-Rook vs. King-Pawn): King+Rook versus King+Pawn on a7 (usually abbreviated KRKPA7).
3. Mushroom: From Audobon Society Field Guide; mushrooms described in terms of physical characteristics; classification: poisonous or edible
4. Nursery: Nursery Database was derived from a hierarchical decision model originally developed to rank applications for nursery schools.
5. Connect-4: Contains connect-4 positions