Classification
581 - Specific topics in natural history
620 - Engineering & allied operations
600 - Technology
63
363 - Other social problems & services
59
333 - Economics of land & energy
34
900 - History & geography
29
700 - The arts; fine & decorative arts
23
580 - Plants (Botany)
22
630 - Agriculture & related technologies
22
330 - Economics
20
551 - Geology, hydrology & meteorology
16
000 - Computer science, information & general works
15
140 - Specific philosophical schools
13
320 - Political science
11
500 - Natural sciences & mathematics
10
610 - Medicine & health
10
380 - Commerce, communications & transportation
8
300 - Social sciences
6
414 - Phonology & phonetics
6
540 - Chemistry & allied sciences
6
576 - Genetics & evolution
6
170 - Ethics
3
370 - Education
3
590 - Animals (Zoology)
3
612 - Human physiology
3
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
340 - Law
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
530 - Physics
1
658 - General management
1
770 - Photography, photographs & computer art
1
780 - Music
1