500-599
Natural Sciences and Mathematics
| 500 |
Science |
| 510 |
Mathematics |
| 520 |
Astronomy and
allied sciences |
| 530 |
Physics |
| 540 |
Chemistry and
allied operations |
| 550 |
Earth sciences |
| 560 |
Paleontology,
Paleozoology |
| 570 |
Life sciences |
| 580 |
Botanical
science |
| 590 |
Zoological
sciences |
