Classification
610 - Medicine & health
56
600 - Technology
42
000 - Computer science, information & general works
39
664 - Food technology
37
330 - Economics
35
363 - Other social problems & services
34
700 - The arts; fine & decorative arts
29
580 - Plants (Botany)
23
576 - Genetics & evolution
22
630 - Agriculture & related technologies
22
620 - Engineering & allied operations
19
333 - Economics of land & energy
17
641 - Food & drink
17
140 - Specific philosophical schools
14
500 - Natural sciences & mathematics
12
540 - Chemistry & allied sciences
11
380 - Commerce, communications & transportation
8
551 - Geology, hydrology & meteorology
8
615 - Pharmacology & therapeutics
8
658 - General management
8
900 - History & geography
8
320 - Political science
6
361 - Social problems & social welfare in general
5
581 - Specific topics in natural history
5
304 - Factors affecting social behavior
4
370 - Education
4
340 - Law
3
612 - Human physiology
3
100 - Philosophy & psychology
2
170 - Ethics
2
300 - Social sciences
2
543 - Analytical chemistry
2
613 - Personal health & safety
2
628 - Sanitary & municipal engineering
2
006 - Special computer methods
1
200 - Religion
1
334 - Cooperatives
1
338 - Production
1
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
570 - Life sciences; biology
1
579 - Microorganisms, fungi & algae
1
631 - Techniques, equipment & materials
1
640 - Home & family management
1
660 - Chemical engineering
1
720 - Architecture
1
more ...