Classification
300 - Social sciences
330 - Economics
52
658 - General management
52
331 - Labor economics
35
338 - Production
29
500 - Natural sciences & mathematics
29
302 - Social interaction
25
670 - Manufacturing
22
368 - Insurance
5
381 - Commerce
4
005 - Computer programming, programs & data
3
100 - Philosophy & psychology
3
153 - Mental processes & intelligence
3
333 - Economics of land & energy
3
361 - Social problems & social welfare in general
3
364 - Criminology
3
380 - Commerce, communications & transportation
3
006 - Special computer methods
2
140 - Specific philosophical schools
2
170 - Ethics
2
320 - Political science
2
340 - Law
2
362 - Social welfare problems & services
2
370 - Education
2
371 - Schools & their activities; special education
2
384 - Communications; telecommunication
2
600 - Technology
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
001 - Knowledge
1
004 - Data processing & computer science
1
301 - Sociology & anthropology
1
332 - Financial economics
1
352 - General considerations of public administration
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
410 - Linguistics
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
651 - Office services
1
700 - The arts; fine & decorative arts
1