Classification
363 - Other social problems & services
600 - Technology
184
333 - Economics of land & energy
175
700 - The arts; fine & decorative arts
168
000 - Computer science, information & general works
152
330 - Economics
148
620 - Engineering & allied operations
130
610 - Medicine & health
116
900 - History & geography
103
380 - Commerce, communications & transportation
73
140 - Specific philosophical schools
65
551 - Geology, hydrology & meteorology
62
580 - Plants (Botany)
59
320 - Political science
58
370 - Education
42
630 - Agriculture & related technologies
36
540 - Chemistry & allied sciences
26
658 - General management
26
500 - Natural sciences & mathematics
25
720 - Architecture
22
581 - Specific topics in natural history
21
800 - Literature & rhetoric
21
340 - Law
17
576 - Genetics & evolution
17
304 - Factors affecting social behavior
14
170 - Ethics
12
400 - Language
11
414 - Phonology & phonetics
10
657 - Accounting
8
100 - Philosophy & psychology
7
300 - Social sciences
7
361 - Social problems & social welfare in general
7
530 - Physics
6
410 - Linguistics
5
612 - Human physiology
5
550 - Earth sciences
4
615 - Pharmacology & therapeutics
4
200 - Religion
3
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
590 - Animals (Zoology)
2
780 - Music
2
001 - Knowledge
1
120 - Epistemology, causation & humankind
1
160 - Logic
1
360 - Social problems & services; associations
1
364 - Criminology
1
368 - Insurance
1
519 - Probabilities & applied mathematics
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
more ...