Classification
000 - Computer science, information & general works
40
700 - The arts; fine & decorative arts
40
610 - Medicine & health
35
600 - Technology
33
333 - Economics of land & energy
27
580 - Plants (Botany)
26
620 - Engineering & allied operations
24
363 - Other social problems & services
18
380 - Commerce, communications & transportation
17
540 - Chemistry & allied sciences
14
630 - Agriculture & related technologies
13
140 - Specific philosophical schools
12
900 - History & geography
11
330 - Economics
10
570 - Life sciences; biology
9
551 - Geology, hydrology & meteorology
8
530 - Physics
7
414 - Phonology & phonetics
6
658 - General management
6
612 - Human physiology
5
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
370 - Education
3
541 - Physical chemistry
3
546 - Inorganic chemistry
3
615 - Pharmacology & therapeutics
3
720 - Architecture
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
320 - Political science
2
500 - Natural sciences & mathematics
2
547 - Organic chemistry
2
628 - Sanitary & municipal engineering
2
340 - Law
1
549 - Mineralogy
1
572 - Biochemistry
1
574 - [Unassigned]
1
621 - Applied physics
1
622 - Mining & related operations
1
632 - Plant injuries, diseases & pests
1
664 - Food technology
1
681 - Precision instruments & other devices
1