Classification
610 - Medicine & health
700 - The arts; fine & decorative arts
600 - Technology
42
333 - Economics of land & energy
38
000 - Computer science, information & general works
37
363 - Other social problems & services
36
140 - Specific philosophical schools
28
620 - Engineering & allied operations
27
330 - Economics
24
900 - History & geography
24
580 - Plants (Botany)
18
551 - Geology, hydrology & meteorology
17
380 - Commerce, communications & transportation
16
320 - Political science
12
630 - Agriculture & related technologies
11
370 - Education
7
576 - Genetics & evolution
7
581 - Specific topics in natural history
7
720 - Architecture
7
340 - Law
6
500 - Natural sciences & mathematics
6
612 - Human physiology
6
658 - General management
5
100 - Philosophy & psychology
4
530 - Physics
4
170 - Ethics
3
304 - Factors affecting social behavior
3
400 - Language
3
540 - Chemistry & allied sciences
3
615 - Pharmacology & therapeutics
3
800 - Literature & rhetoric
3
200 - Religion
2
300 - Social sciences
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
657 - Accounting
1