Classification
658 - General management
885
006 - Special computer methods
110
005 - Computer programming, programs & data
88
620 - Engineering & allied operations
71
004 - Data processing & computer science
62
551 - Geology, hydrology & meteorology
57
650 - Management & auxiliary services
54
571 - Physiology & related subjects
48
630 - Agriculture & related technologies
47
616 - Diseases
41
621 - Applied physics
39
381 - Commerce
38
580 - Plants (Botany)
38
333 - Economics of land & energy
32
338 - Production
32
577 - Ecology
31
003 - Systems
30
579 - Microorganisms, fungi & algae
30
332 - Financial economics
26
664 - Food technology
24
572 - Biochemistry
23
660 - Chemical engineering
22
541 - Physical chemistry
21
659 - Advertising & public relations
21
670 - Manufacturing
21
550 - Earth sciences
20
631 - Techniques, equipment & materials
20
547 - Organic chemistry
19
581 - Specific topics in natural history
18
304 - Factors affecting social behavior
16
330 - Economics
16
363 - Other social problems & services
16
530 - Physics
16
641 - Food & drink
16
306 - Culture & institutions
14
340 - Law
13
610 - Medicine & health
13
615 - Pharmacology & therapeutics
13
657 - Accounting
13
910 - Geography & travel
13
343 - Military, tax, trade & industrial law
11
570 - Life sciences; biology
11
624 - Civil engineering
11
519 - Probabilities & applied mathematics
10
613 - Personal health & safety
10
302 - Social interaction
9
612 - Human physiology
9
614 - Incidence & prevention of disease
8
930 - History of ancient world to ca. 499
8
629 - Other branches of engineering
7
more ...