Classification
600 - Technology
900 - History & geography
620 - Engineering & allied operations
14
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
5
580 - Plants (Botany)
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
340 - Law
2
363 - Other social problems & services
2
630 - Agriculture & related technologies
2
720 - Architecture
2
770 - Photography, photographs & computer art
2
330 - Economics
1
400 - Language
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1