Classification
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
116
600 - Technology
101
330 - Economics
100
900 - History & geography
96
000 - Computer science, information & general works
83
333 - Economics of land & energy
77
320 - Political science
71
100 - Philosophy & psychology
56
370 - Education
50
620 - Engineering & allied operations
50
140 - Specific philosophical schools
49
300 - Social sciences
49
363 - Other social problems & services
48
500 - Natural sciences & mathematics
38
610 - Medicine & health
37
576 - Genetics & evolution
34
658 - General management
31
340 - Law
26
384 - Communications; telecommunication
23
400 - Language
23
800 - Literature & rhetoric
23
720 - Architecture
20
410 - Linguistics
18
200 - Religion
17
170 - Ethics
15
301 - Sociology & anthropology
13
780 - Music
12
551 - Geology, hydrology & meteorology
11
302 - Social interaction
10
304 - Factors affecting social behavior
10
530 - Physics
10
670 - Manufacturing
8
540 - Chemistry & allied sciences
7
581 - Specific topics in natural history
7
004 - Data processing & computer science
6
791 - Public performances
6
120 - Epistemology, causation & humankind
5
350 - Public administration & military science
5
580 - Plants (Botany)
5
630 - Agriculture & related technologies
5
361 - Social problems & social welfare in general
4
414 - Phonology & phonetics
4
808 - Rhetoric & collections of literature
4
297 - Islam, Babism & Bahai Faith
3
612 - Human physiology
3
650 - Management & auxiliary services
3
657 - Accounting
3
150 - Psychology
2
155 - Differential & developmental psychology
2
more ...