Classification
600 - Technology
164
700 - The arts; fine & decorative arts
164
620 - Engineering & allied operations
133
363 - Other social problems & services
109
000 - Computer science, information & general works
106
333 - Economics of land & energy
103
540 - Chemistry & allied sciences
98
900 - History & geography
75
580 - Plants (Botany)
48
610 - Medicine & health
45
330 - Economics
43
380 - Commerce, communications & transportation
35
541 - Physical chemistry
28
628 - Sanitary & municipal engineering
28
576 - Genetics & evolution
27
530 - Physics
25
414 - Phonology & phonetics
24
630 - Agriculture & related technologies
19
140 - Specific philosophical schools
16
500 - Natural sciences & mathematics
16
660 - Chemical engineering
16
551 - Geology, hydrology & meteorology
14
615 - Pharmacology & therapeutics
14
547 - Organic chemistry
12
612 - Human physiology
12
668 - Technology of other organic products
12
304 - Factors affecting social behavior
11
621 - Applied physics
10
661 - Industrial chemicals
10
664 - Food technology
8
340 - Law
7
800 - Literature & rhetoric
7
543 - Analytical chemistry
6
320 - Political science
5
370 - Education
5
574 - [Unassigned]
4
658 - General management
4
665 - Industrial oils, fats, waxes & gases
4
546 - Inorganic chemistry
3
581 - Specific topics in natural history
3
622 - Mining & related operations
3
650 - Management & auxiliary services
3
657 - Accounting
3
667 - Cleaning, color & coating technologies
3
301 - Sociology & anthropology
2
577 - Ecology
2
616 - Diseases
2
549 - Mineralogy
1
570 - Life sciences; biology
1
572 - Biochemistry
1
more ...