Classification
333 - Economics of land & energy
620 - Engineering & allied operations
600 - Technology
13
900 - History & geography
12
700 - The arts; fine & decorative arts
10
580 - Plants (Botany)
5
000 - Computer science, information & general works
4
330 - Economics
3
363 - Other social problems & services
3
610 - Medicine & health
3
370 - Education
2
414 - Phonology & phonetics
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
320 - Political science
1
340 - Law
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
576 - Genetics & evolution
1
657 - Accounting
1
720 - Architecture
1
770 - Photography, photographs & computer art
1