Classification
333 - Economics of land & energy
576 - Genetics & evolution
700 - The arts; fine & decorative arts
59
600 - Technology
50
000 - Computer science, information & general works
43
900 - History & geography
42
620 - Engineering & allied operations
41
380 - Commerce, communications & transportation
24
330 - Economics
18
363 - Other social problems & services
18
500 - Natural sciences & mathematics
15
580 - Plants (Botany)
15
530 - Physics
13
610 - Medicine & health
10
720 - Architecture
9
140 - Specific philosophical schools
8
340 - Law
8
540 - Chemistry & allied sciences
8
800 - Literature & rhetoric
6
551 - Geology, hydrology & meteorology
5
320 - Political science
4
410 - Linguistics
4
370 - Education
3
400 - Language
3
414 - Phonology & phonetics
3
630 - Agriculture & related technologies
3
658 - General management
3
160 - Logic
2
170 - Ethics
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
650 - Management & auxiliary services
2
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1
770 - Photography, photographs & computer art
1