Classification
620 - Engineering & allied operations
600 - Technology
169
900 - History & geography
142
700 - The arts; fine & decorative arts
104
333 - Economics of land & energy
67
000 - Computer science, information & general works
66
363 - Other social problems & services
58
380 - Commerce, communications & transportation
43
610 - Medicine & health
41
580 - Plants (Botany)
34
140 - Specific philosophical schools
30
576 - Genetics & evolution
27
630 - Agriculture & related technologies
27
330 - Economics
26
551 - Geology, hydrology & meteorology
17
720 - Architecture
17
500 - Natural sciences & mathematics
15
340 - Law
12
400 - Language
12
320 - Political science
11
370 - Education
10
414 - Phonology & phonetics
10
800 - Literature & rhetoric
8
300 - Social sciences
7
100 - Philosophy & psychology
6
540 - Chemistry & allied sciences
6
581 - Specific topics in natural history
6
658 - General management
6
304 - Factors affecting social behavior
5
170 - Ethics
4
612 - Human physiology
4
770 - Photography, photographs & computer art
4
302 - Social interaction
2
331 - Labor economics
2
526 - Mathematical geography
2
530 - Physics
2
910 - Geography & travel
2
006 - Special computer methods
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
384 - Communications; telecommunication
1
410 - Linguistics
1
550 - Earth sciences
1
657 - Accounting
1
741 - Drawing & drawings
1
745 - Decorative arts
1
780 - Music
1