Classification
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
274
333 - Economics of land & energy
151
380 - Commerce, communications & transportation
77
000 - Computer science, information & general works
73
330 - Economics
60
363 - Other social problems & services
59
610 - Medicine & health
47
580 - Plants (Botany)
43
140 - Specific philosophical schools
38
576 - Genetics & evolution
34
720 - Architecture
34
500 - Natural sciences & mathematics
24
340 - Law
23
320 - Political science
12
630 - Agriculture & related technologies
12
530 - Physics
11
551 - Geology, hydrology & meteorology
11
370 - Education
10
414 - Phonology & phonetics
10
658 - General management
9
800 - Literature & rhetoric
8
400 - Language
7
540 - Chemistry & allied sciences
5
100 - Philosophy & psychology
3
170 - Ethics
3
770 - Photography, photographs & computer art
3
300 - Social sciences
2
304 - Factors affecting social behavior
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
360 - Social problems & services; associations
1
581 - Specific topics in natural history
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
780 - Music
1
791 - Public performances
1