Dewey navigator
Select a description to see subdivisions
| Code | Description | Items |
|---|---|---|
| 620 | Engineering & allied operations | 102 |
| 621 | Applied physics | 44 |
| 622 | Mining & related operations | 0 |
| 623 | Military & nautical engineering | 6 |
| 624 | Civil engineering | 24 |
| 625 | Engineering of railroads, roads | 0 |
| 627 | Hydraulic engineering | 0 |
| 628 | Sanitary & municipal engineering | 6 |
| 629 | Other branches of engineering | 62 |