Classification
000 - Computer science, information & general works
330 - Economics
620 - Engineering & allied operations
600 - Technology
103
333 - Economics of land & energy
70
700 - The arts; fine & decorative arts
64
900 - History & geography
59
363 - Other social problems & services
45
630 - Agriculture & related technologies
33
380 - Commerce, communications & transportation
27
320 - Political science
23
610 - Medicine & health
21
580 - Plants (Botany)
20
720 - Architecture
20
576 - Genetics & evolution
18
140 - Specific philosophical schools
16
551 - Geology, hydrology & meteorology
16
658 - General management
13
370 - Education
9
500 - Natural sciences & mathematics
9
400 - Language
7
170 - Ethics
6
340 - Law
6
581 - Specific topics in natural history
6
300 - Social sciences
4
414 - Phonology & phonetics
4
530 - Physics
4
540 - Chemistry & allied sciences
4
800 - Literature & rhetoric
4
100 - Philosophy & psychology
3
410 - Linguistics
3
657 - Accounting
3
780 - Music
3
304 - Factors affecting social behavior
2
770 - Photography, photographs & computer art
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
615 - Pharmacology & therapeutics
1