Classification
380 - Commerce, communications & transportation
900 - History & geography
600 - Technology
321
620 - Engineering & allied operations
295
700 - The arts; fine & decorative arts
239
333 - Economics of land & energy
178
330 - Economics
121
000 - Computer science, information & general works
112
363 - Other social problems & services
99
320 - Political science
86
140 - Specific philosophical schools
67
610 - Medicine & health
55
370 - Education
43
576 - Genetics & evolution
43
800 - Literature & rhetoric
42
300 - Social sciences
41
720 - Architecture
39
580 - Plants (Botany)
34
400 - Language
32
340 - Law
30
200 - Religion
29
551 - Geology, hydrology & meteorology
28
500 - Natural sciences & mathematics
22
658 - General management
22
100 - Philosophy & psychology
19
410 - Linguistics
18
301 - Sociology & anthropology
16
304 - Factors affecting social behavior
14
630 - Agriculture & related technologies
14
780 - Music
14
414 - Phonology & phonetics
11
530 - Physics
10
540 - Chemistry & allied sciences
10
581 - Specific topics in natural history
10
170 - Ethics
7
297 - Islam, Babism & Bahai Faith
5
550 - Earth sciences
4
612 - Human physiology
4
791 - Public performances
4
120 - Epistemology, causation & humankind
3
770 - Photography, photographs & computer art
3
296 - Judaism
2
361 - Social problems & social welfare in general
2
650 - Management & auxiliary services
2
657 - Accounting
2
336 - Public finance
1
360 - Social problems & services; associations
1
364 - Criminology
1
590 - Animals (Zoology)
1
614 - Incidence & prevention of disease
1