Classification
700 - The arts; fine & decorative arts
88
600 - Technology
87
000 - Computer science, information & general works
78
333 - Economics of land & energy
78
620 - Engineering & allied operations
75
900 - History & geography
61
380 - Commerce, communications & transportation
26
500 - Natural sciences & mathematics
26
530 - Physics
26
610 - Medicine & health
21
363 - Other social problems & services
18
330 - Economics
15
340 - Law
15
576 - Genetics & evolution
14
551 - Geology, hydrology & meteorology
13
580 - Plants (Botany)
12
531 - Classical mechanics; solid mechanics
10
140 - Specific philosophical schools
8
414 - Phonology & phonetics
8
540 - Chemistry & allied sciences
7
100 - Philosophy & psychology
6
612 - Human physiology
6
630 - Agriculture & related technologies
6
658 - General management
6
720 - Architecture
6
320 - Political science
5
621 - Applied physics
5
400 - Language
4
800 - Literature & rhetoric
4
510 - Mathematics
3
550 - Earth sciences
3
581 - Specific topics in natural history
3
003 - Systems
2
304 - Factors affecting social behavior
2
410 - Linguistics
2
515 - Analysis
2
520 - Astronomy & allied sciences
2
541 - Physical chemistry
2
615 - Pharmacology & therapeutics
2
650 - Management & auxiliary services
2
780 - Music
2
331 - Labor economics
1
370 - Education
1
384 - Communications; telecommunication
1
519 - Probabilities & applied mathematics
1
523 - Specific celestial bodies & phenomena
1
529 - Chronology
1
546 - Inorganic chemistry
1
547 - Organic chemistry
1
616 - Diseases
1
more ...