Classification
658 - General management
330 - Economics
36
700 - The arts; fine & decorative arts
27
600 - Technology
26
000 - Computer science, information & general works
22
620 - Engineering & allied operations
21
333 - Economics of land & energy
19
380 - Commerce, communications & transportation
19
900 - History & geography
14
363 - Other social problems & services
13
500 - Natural sciences & mathematics
13
580 - Plants (Botany)
12
140 - Specific philosophical schools
9
576 - Genetics & evolution
7
610 - Medicine & health
7
153 - Mental processes & intelligence
5
551 - Geology, hydrology & meteorology
5
320 - Political science
4
370 - Education
4
400 - Language
3
530 - Physics
3
630 - Agriculture & related technologies
3
650 - Management & auxiliary services
3
670 - Manufacturing
3
720 - Architecture
3
800 - Literature & rhetoric
3
300 - Social sciences
2
302 - Social interaction
2
331 - Labor economics
2
340 - Law
2
414 - Phonology & phonetics
2
510 - Mathematics
2
519 - Probabilities & applied mathematics
2
745 - Decorative arts
2
001 - Knowledge
1
003 - Systems
1
004 - Data processing & computer science
1
005 - Computer programming, programs & data
1
303 - Social processes
1
304 - Factors affecting social behavior
1
332 - Financial economics
1
338 - Production
1
361 - Social problems & social welfare in general
1
368 - Insurance
1
384 - Communications; telecommunication
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
577 - Ecology
1
780 - Music
1