Classification
600 - Technology
620 - Engineering & allied operations
117
363 - Other social problems & services
59
000 - Computer science, information & general works
48
630 - Agriculture & related technologies
46
300 - Social sciences
45
900 - History & geography
45
330 - Economics
43
320 - Political science
38
333 - Economics of land & energy
36
370 - Education
34
700 - The arts; fine & decorative arts
31
140 - Specific philosophical schools
30
380 - Commerce, communications & transportation
29
100 - Philosophy & psychology
23
720 - Architecture
21
610 - Medicine & health
18
540 - Chemistry & allied sciences
14
581 - Specific topics in natural history
14
551 - Geology, hydrology & meteorology
12
170 - Ethics
11
800 - Literature & rhetoric
10
500 - Natural sciences & mathematics
8
301 - Sociology & anthropology
7
340 - Law
7
410 - Linguistics
7
200 - Religion
6
780 - Music
6
400 - Language
5
530 - Physics
5
576 - Genetics & evolution
5
580 - Plants (Botany)
5
791 - Public performances
4
590 - Animals (Zoology)
3
304 - Factors affecting social behavior
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
2
520 - Astronomy & allied sciences
2
550 - Earth sciences
2
120 - Epistemology, causation & humankind
1
364 - Criminology
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1
770 - Photography, photographs & computer art
1