Classification
500 - Natural sciences & mathematics
300 - Social sciences
126
658 - General management
60
330 - Economics
49
302 - Social interaction
32
005 - Computer programming, programs & data
31
000 - Computer science, information & general works
30
670 - Manufacturing
25
620 - Engineering & allied operations
22
380 - Commerce, communications & transportation
20
333 - Economics of land & energy
17
700 - The arts; fine & decorative arts
17
384 - Communications; telecommunication
14
600 - Technology
14
338 - Production
13
004 - Data processing & computer science
12
331 - Labor economics
11
363 - Other social problems & services
11
540 - Chemistry & allied sciences
10
610 - Medicine & health
10
576 - Genetics & evolution
7
140 - Specific philosophical schools
5
340 - Law
5
362 - Social welfare problems & services
5
547 - Organic chemistry
5
580 - Plants (Botany)
5
581 - Specific topics in natural history
5
900 - History & geography
5
100 - Philosophy & psychology
4
551 - Geology, hydrology & meteorology
4
612 - Human physiology
4
006 - Special computer methods
3
153 - Mental processes & intelligence
3
158 - Applied psychology
3
304 - Factors affecting social behavior
3
332 - Financial economics
3
371 - Schools & their activities; special education
3
381 - Commerce
3
650 - Management & auxiliary services
3
001 - Knowledge
2
025 - Library operations
2
150 - Psychology
2
306 - Culture & institutions
2
352 - General considerations of public administration
2
370 - Education
2
410 - Linguistics
2
510 - Mathematics
2
519 - Probabilities & applied mathematics
2
530 - Physics
2
720 - Architecture
2
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