Classification
658 - General management
588
330 - Economics
257
670 - Manufacturing
108
300 - Social sciences
59
500 - Natural sciences & mathematics
58
302 - Social interaction
49
338 - Production
41
620 - Engineering & allied operations
26
331 - Labor economics
18
000 - Computer science, information & general works
17
381 - Commerce
14
304 - Factors affecting social behavior
12
332 - Financial economics
10
519 - Probabilities & applied mathematics
10
650 - Management & auxiliary services
10
153 - Mental processes & intelligence
8
629 - Other branches of engineering
8
005 - Computer programming, programs & data
7
368 - Insurance
7
003 - Systems
6
006 - Special computer methods
6
333 - Economics of land & energy
6
384 - Communications; telecommunication
6
621 - Applied physics
6
001 - Knowledge
5
510 - Mathematics
5
355 - Military science
3
388 - Transportation; ground transportation
3
600 - Technology
3
657 - Accounting
3
004 - Data processing & computer science
2
158 - Applied psychology
2
362 - Social welfare problems & services
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
624 - Civil engineering
2
011 - Bibliographies
1
174 - Occupational ethics
1
339 - Macroeconomics & related topics
1
352 - General considerations of public administration
1
374 - Adult education
1
382 - International commerce
1
387 - Water, air & space transportation
1
515 - Analysis
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1
633 - Field & plantation crops
1
641 - Food & drink
1
more ...