| Code | Description | Items |
|---|---|---|
| 500 | Natural sciences & mathematics | 527 |
| 510 | Mathematics | 339 |
| 520 | Astronomy & allied sciences | 370 |
| 530 | Physics | 533 |
| 540 | Chemistry & allied sciences | 142 |
| 550 | Earth sciences | 419 |
| 560 | Paleontology Paleozoology | 107 |
| 570 | Life sciences | 684 |
| 580 | Botanical sciences | 343 |
| 590 | Zoological sciences | 894 |