Classification
620 - Engineering & allied operations
600 - Technology
319
900 - History & geography
294
700 - The arts; fine & decorative arts
231
333 - Economics of land & energy
175
000 - Computer science, information & general works
117
380 - Commerce, communications & transportation
100
363 - Other social problems & services
73
610 - Medicine & health
61
576 - Genetics & evolution
59
330 - Economics
56
580 - Plants (Botany)
52
140 - Specific philosophical schools
38
500 - Natural sciences & mathematics
37
720 - Architecture
36
630 - Agriculture & related technologies
23
340 - Law
20
400 - Language
15
370 - Education
13
551 - Geology, hydrology & meteorology
13
414 - Phonology & phonetics
12
658 - General management
12
800 - Literature & rhetoric
12
530 - Physics
11
320 - Political science
10
540 - Chemistry & allied sciences
10
300 - Social sciences
6
770 - Photography, photographs & computer art
4
170 - Ethics
3
550 - Earth sciences
3
581 - Specific topics in natural history
3
612 - Human physiology
3
780 - Music
3
100 - Philosophy & psychology
2
120 - Epistemology, causation & humankind
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
650 - Management & auxiliary services
1
657 - Accounting
1