Classification
380 - Commerce, communications & transportation
620 - Engineering & allied operations
600 - Technology
372
900 - History & geography
294
700 - The arts; fine & decorative arts
223
333 - Economics of land & energy
201
000 - Computer science, information & general works
116
363 - Other social problems & services
104
330 - Economics
75
140 - Specific philosophical schools
60
610 - Medicine & health
51
576 - Genetics & evolution
47
580 - Plants (Botany)
43
500 - Natural sciences & mathematics
38
630 - Agriculture & related technologies
35
551 - Geology, hydrology & meteorology
32
720 - Architecture
32
320 - Political science
31
340 - Law
25
370 - Education
23
540 - Chemistry & allied sciences
23
658 - General management
23
800 - Literature & rhetoric
17
300 - Social sciences
16
530 - Physics
16
400 - Language
15
414 - Phonology & phonetics
14
100 - Philosophy & psychology
9
581 - Specific topics in natural history
8
304 - Factors affecting social behavior
7
612 - Human physiology
7
410 - Linguistics
6
780 - Music
6
170 - Ethics
5
361 - Social problems & social welfare in general
3
550 - Earth sciences
3
200 - Religion
2
301 - Sociology & anthropology
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1
791 - Public performances
1