| Code | Description | Items |
|---|---|---|
| 500 | Natural sciences & mathematics | 524 |
| 510 | Mathematics | 336 |
| 520 | Astronomy & allied sciences | 368 |
| 530 | Physics | 531 |
| 540 | Chemistry & allied sciences | 142 |
| 550 | Earth sciences | 418 |
| 560 | Paleontology Paleozoology | 106 |
| 570 | Life sciences | 684 |
| 580 | Botanical sciences | 342 |
| 590 | Zoological sciences | 888 |