Classification
330 - Economics
255
600 - Technology
63
700 - The arts; fine & decorative arts
61
333 - Economics of land & energy
49
620 - Engineering & allied operations
46
539 - Modern physics
45
363 - Other social problems & services
40
610 - Medicine & health
40
000 - Computer science, information & general works
37
900 - History & geography
36
320 - Political science
33
621 - Applied physics
24
380 - Commerce, communications & transportation
23
140 - Specific philosophical schools
22
340 - Law
20
530 - Physics
15
580 - Plants (Botany)
15
336 - Public finance
14
500 - Natural sciences & mathematics
13
523 - Specific celestial bodies & phenomena
13
576 - Genetics & evolution
13
630 - Agriculture & related technologies
10
658 - General management
9
551 - Geology, hydrology & meteorology
8
612 - Human physiology
8
720 - Architecture
8
100 - Philosophy & psychology
7
370 - Education
7
537 - Electricity & electronics
7
128 - Humankind
6
332 - Financial economics
6
300 - Social sciences
5
338 - Production
5
520 - Astronomy & allied sciences
5
800 - Literature & rhetoric
5
170 - Ethics
4
301 - Sociology & anthropology
3
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
3
400 - Language
3
410 - Linguistics
3
535 - Light & infrared & ultraviolet phenomena
3
543 - Analytical chemistry
3
581 - Specific topics in natural history
3
297 - Islam, Babism & Bahai Faith
2
343 - Military, tax, trade & industrial law
2
414 - Phonology & phonetics
2
550 - Earth sciences
2
004 - Data processing & computer science
1
120 - Epistemology, causation & humankind
1
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