Classification
700 - The arts; fine & decorative arts
54
600 - Technology
52
620 - Engineering & allied operations
47
900 - History & geography
43
340 - Law
39
380 - Commerce, communications & transportation
31
000 - Computer science, information & general works
30
333 - Economics of land & energy
29
576 - Genetics & evolution
19
140 - Specific philosophical schools
16
363 - Other social problems & services
15
530 - Physics
12
330 - Economics
10
610 - Medicine & health
10
500 - Natural sciences & mathematics
8
720 - Architecture
8
580 - Plants (Botany)
7
400 - Language
6
630 - Agriculture & related technologies
6
800 - Literature & rhetoric
6
320 - Political science
5
414 - Phonology & phonetics
4
541 - Physical chemistry
4
520 - Astronomy & allied sciences
3
539 - Modern physics
3
540 - Chemistry & allied sciences
3
615 - Pharmacology & therapeutics
3
170 - Ethics
2
300 - Social sciences
2
543 - Analytical chemistry
2
551 - Geology, hydrology & meteorology
2
629 - Other branches of engineering
2
658 - General management
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
370 - Education
1
546 - Inorganic chemistry
1
547 - Organic chemistry
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1
780 - Music
1