Classification
004 - Data processing & computer science
330
005 - Computer programming, programs & data
305
006 - Special computer methods
295
620 - Engineering & allied operations
123
621 - Applied physics
104
700 - The arts; fine & decorative arts
90
658 - General management
89
610 - Medicine & health
81
616 - Diseases
71
629 - Other branches of engineering
70
571 - Physiology & related subjects
52
304 - Factors affecting social behavior
51
140 - Specific philosophical schools
49
330 - Economics
46
333 - Economics of land & energy
45
300 - Social sciences
42
745 - Decorative arts
41
600 - Technology
39
363 - Other social problems & services
32
025 - Library operations
31
670 - Manufacturing
31
001 - Knowledge
30
900 - History & geography
30
720 - Architecture
27
000 - Computer science, information & general works
26
003 - Systems
26
371 - Schools & their activities; special education
26
500 - Natural sciences & mathematics
24
615 - Pharmacology & therapeutics
22
370 - Education
21
320 - Political science
20
572 - Biochemistry
20
380 - Commerce, communications & transportation
19
612 - Human physiology
19
519 - Probabilities & applied mathematics
18
303 - Social processes
17
306 - Culture & institutions
17
740 - Drawing & decorative arts
15
302 - Social interaction
14
338 - Production
13
381 - Commerce
13
384 - Communications; telecommunication
13
551 - Geology, hydrology & meteorology
13
153 - Mental processes & intelligence
12
331 - Labor economics
12
570 - Life sciences; biology
12
800 - Literature & rhetoric
11
910 - Geography & travel
11
400 - Language
10
660 - Chemical engineering
10
more ...