Classification
330 - Economics
333 - Economics of land & energy
600 - Technology
393
363 - Other social problems & services
366
700 - The arts; fine & decorative arts
362
320 - Political science
313
000 - Computer science, information & general works
304
620 - Engineering & allied operations
236
900 - History & geography
232
380 - Commerce, communications & transportation
178
610 - Medicine & health
148
140 - Specific philosophical schools
135
551 - Geology, hydrology & meteorology
125
630 - Agriculture & related technologies
102
580 - Plants (Botany)
98
370 - Education
92
300 - Social sciences
69
658 - General management
69
581 - Specific topics in natural history
65
340 - Law
63
576 - Genetics & evolution
55
100 - Philosophy & psychology
50
500 - Natural sciences & mathematics
49
720 - Architecture
44
304 - Factors affecting social behavior
38
540 - Chemistry & allied sciences
33
800 - Literature & rhetoric
32
170 - Ethics
31
530 - Physics
28
400 - Language
24
361 - Social problems & social welfare in general
23
200 - Religion
20
657 - Accounting
20
301 - Sociology & anthropology
19
410 - Linguistics
16
350 - Public administration & military science
14
414 - Phonology & phonetics
12
336 - Public finance
11
297 - Islam, Babism & Bahai Faith
10
612 - Human physiology
8
780 - Music
7
520 - Astronomy & allied sciences
4
770 - Photography, photographs & computer art
4
360 - Social problems & services; associations
3
650 - Management & auxiliary services
3
120 - Epistemology, causation & humankind
2
160 - Logic
2
550 - Earth sciences
2
364 - Criminology
1
615 - Pharmacology & therapeutics
1
more ...