Classification
363 - Other social problems & services
620 - Engineering & allied operations
900 - History & geography
600 - Technology
335
700 - The arts; fine & decorative arts
174
333 - Economics of land & energy
163
330 - Economics
88
380 - Commerce, communications & transportation
72
000 - Computer science, information & general works
58
610 - Medicine & health
55
580 - Plants (Botany)
54
551 - Geology, hydrology & meteorology
49
140 - Specific philosophical schools
43
320 - Political science
32
576 - Genetics & evolution
29
720 - Architecture
29
370 - Education
26
630 - Agriculture & related technologies
23
581 - Specific topics in natural history
20
800 - Literature & rhetoric
19
340 - Law
16
540 - Chemistry & allied sciences
16
500 - Natural sciences & mathematics
15
414 - Phonology & phonetics
13
658 - General management
12
400 - Language
11
300 - Social sciences
10
304 - Factors affecting social behavior
9
100 - Philosophy & psychology
5
170 - Ethics
5
770 - Photography, photographs & computer art
4
297 - Islam, Babism & Bahai Faith
3
301 - Sociology & anthropology
3
530 - Physics
3
200 - Religion
2
410 - Linguistics
2
612 - Human physiology
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
615 - Pharmacology & therapeutics
1