Classification
330 - Economics
363 - Other social problems & services
900 - History & geography
600 - Technology
92
620 - Engineering & allied operations
88
333 - Economics of land & energy
85
700 - The arts; fine & decorative arts
72
000 - Computer science, information & general works
47
380 - Commerce, communications & transportation
39
320 - Political science
35
551 - Geology, hydrology & meteorology
27
610 - Medicine & health
25
140 - Specific philosophical schools
23
370 - Education
21
580 - Plants (Botany)
16
581 - Specific topics in natural history
16
720 - Architecture
16
300 - Social sciences
15
301 - Sociology & anthropology
10
340 - Law
10
658 - General management
9
576 - Genetics & evolution
8
800 - Literature & rhetoric
8
304 - Factors affecting social behavior
6
630 - Agriculture & related technologies
6
200 - Religion
5
400 - Language
5
414 - Phonology & phonetics
5
100 - Philosophy & psychology
4
540 - Chemistry & allied sciences
4
170 - Ethics
3
297 - Islam, Babism & Bahai Faith
3
530 - Physics
3
410 - Linguistics
2
500 - Natural sciences & mathematics
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1