Classification
330 - Economics
600 - Technology
610 - Medicine & health
333 - Economics of land & energy
80
304 - Factors affecting social behavior
70
700 - The arts; fine & decorative arts
65
363 - Other social problems & services
62
620 - Engineering & allied operations
59
370 - Education
47
320 - Political science
45
000 - Computer science, information & general works
43
900 - History & geography
43
140 - Specific philosophical schools
31
380 - Commerce, communications & transportation
30
630 - Agriculture & related technologies
30
551 - Geology, hydrology & meteorology
23
658 - General management
20
580 - Plants (Botany)
19
100 - Philosophy & psychology
12
581 - Specific topics in natural history
12
300 - Social sciences
11
576 - Genetics & evolution
9
170 - Ethics
8
720 - Architecture
8
800 - Literature & rhetoric
8
500 - Natural sciences & mathematics
6
540 - Chemistry & allied sciences
6
340 - Law
5
200 - Religion
4
301 - Sociology & anthropology
4
400 - Language
4
530 - Physics
4
615 - Pharmacology & therapeutics
4
361 - Social problems & social welfare in general
3
780 - Music
3
336 - Public finance
2
350 - Public administration & military science
2
360 - Social problems & services; associations
2
414 - Phonology & phonetics
2
297 - Islam, Babism & Bahai Faith
1
338 - Production
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
612 - Human physiology
1
791 - Public performances
1