Classification
000 - Computer science, information & general works
185
580 - Plants (Botany)
146
700 - The arts; fine & decorative arts
146
600 - Technology
126
363 - Other social problems & services
124
610 - Medicine & health
124
333 - Economics of land & energy
108
620 - Engineering & allied operations
104
330 - Economics
92
630 - Agriculture & related technologies
85
551 - Geology, hydrology & meteorology
81
900 - History & geography
77
581 - Specific topics in natural history
53
380 - Commerce, communications & transportation
50
320 - Political science
49
140 - Specific philosophical schools
38
576 - Genetics & evolution
32
414 - Phonology & phonetics
29
664 - Food technology
22
540 - Chemistry & allied sciences
20
500 - Natural sciences & mathematics
19
658 - General management
17
612 - Human physiology
16
800 - Literature & rhetoric
15
615 - Pharmacology & therapeutics
13
370 - Education
12
304 - Factors affecting social behavior
11
300 - Social sciences
9
720 - Architecture
9
100 - Philosophy & psychology
8
170 - Ethics
7
340 - Law
6
361 - Social problems & social welfare in general
6
550 - Earth sciences
5
660 - Chemical engineering
5
770 - Photography, photographs & computer art
5
613 - Personal health & safety
4
230 - Christianity & Christian theology
3
530 - Physics
3
547 - Organic chemistry
3
301 - Sociology & anthropology
2
400 - Language
2
543 - Analytical chemistry
2
570 - Life sciences; biology
2
572 - Biochemistry
2
616 - Diseases
2
635 - Garden crops (Horticulture)
2
640 - Home & family management
2
650 - Management & auxiliary services
2
663 - Beverage technology
2
more ...