Classification
600 - Technology
800 - Literature & rhetoric
900 - History & geography
70
620 - Engineering & allied operations
62
700 - The arts; fine & decorative arts
60
333 - Economics of land & energy
50
000 - Computer science, information & general works
37
363 - Other social problems & services
34
330 - Economics
30
380 - Commerce, communications & transportation
27
140 - Specific philosophical schools
23
576 - Genetics & evolution
18
610 - Medicine & health
17
320 - Political science
13
370 - Education
12
580 - Plants (Botany)
12
720 - Architecture
12
630 - Agriculture & related technologies
10
400 - Language
7
410 - Linguistics
7
530 - Physics
7
658 - General management
7
100 - Philosophy & psychology
6
300 - Social sciences
6
340 - Law
6
414 - Phonology & phonetics
6
500 - Natural sciences & mathematics
5
551 - Geology, hydrology & meteorology
5
304 - Factors affecting social behavior
4
170 - Ethics
3
540 - Chemistry & allied sciences
3
297 - Islam, Babism & Bahai Faith
2
581 - Specific topics in natural history
2
657 - Accounting
2
809 - History, description & criticism
2
120 - Epistemology, causation & humankind
1
200 - Religion
1
301 - Sociology & anthropology
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
398 - Folklore
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1
780 - Music
1
791 - Public performances
1