Classification
000 - Computer science, information & general works
39
700 - The arts; fine & decorative arts
38
620 - Engineering & allied operations
28
600 - Technology
25
900 - History & geography
24
363 - Other social problems & services
22
333 - Economics of land & energy
13
580 - Plants (Botany)
13
551 - Geology, hydrology & meteorology
12
330 - Economics
8
610 - Medicine & health
8
630 - Agriculture & related technologies
8
500 - Natural sciences & mathematics
6
320 - Political science
5
380 - Commerce, communications & transportation
5
576 - Genetics & evolution
5
621 - Applied physics
5
414 - Phonology & phonetics
4
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
3
530 - Physics
3
720 - Architecture
3
800 - Literature & rhetoric
3
370 - Education
2
650 - Management & auxiliary services
2
658 - General management
2
340 - Law
1
384 - Communications; telecommunication
1
510 - Mathematics
1
550 - Earth sciences
1
657 - Accounting
1