| Code | Description | Items |
|---|---|---|
| 140 | Specific philosophical schools | 2 |
| 141 | Idealism & related systems | 12 |
| 142 | Critical philosophy | 18 |
| 143 | Intuitionism & Bergsonism | 0 |
| 144 | Humanism & related systems | 8 |
| 145 | Sensationalism | 0 |
| 146 | Naturalism & related systems | 22 |
| 147 | Pantheism & related systems | 0 |
| 148 | Liberalism, eclecticism, traditionalism | 0 |
| 149 | Other philosophical systems | 45 |