Classification
330 - Economics
129
700 - The arts; fine & decorative arts
84
000 - Computer science, information & general works
76
333 - Economics of land & energy
75
363 - Other social problems & services
64
551 - Geology, hydrology & meteorology
57
610 - Medicine & health
50
600 - Technology
47
320 - Political science
44
900 - History & geography
43
140 - Specific philosophical schools
41
380 - Commerce, communications & transportation
36
620 - Engineering & allied operations
31
370 - Education
21
576 - Genetics & evolution
17
100 - Philosophy & psychology
16
630 - Agriculture & related technologies
16
304 - Factors affecting social behavior
12
658 - General management
12
540 - Chemistry & allied sciences
11
170 - Ethics
10
800 - Literature & rhetoric
10
340 - Law
9
580 - Plants (Botany)
9
581 - Specific topics in natural history
9
300 - Social sciences
7
361 - Social problems & social welfare in general
7
400 - Language
7
414 - Phonology & phonetics
7
500 - Natural sciences & mathematics
6
200 - Religion
5
301 - Sociology & anthropology
5
530 - Physics
5
720 - Architecture
5
410 - Linguistics
4
550 - Earth sciences
3
657 - Accounting
3
791 - Public performances
3
297 - Islam, Babism & Bahai Faith
2
005 - Computer programming, programs & data
1
155 - Differential & developmental psychology
1
305 - Social groups
1
331 - Labor economics
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
364 - Criminology
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
780 - Music
1
880 - Hellenic literatures; classical Greek
1