Classification
600 - Technology
700 - The arts; fine & decorative arts
330 - Economics
33
333 - Economics of land & energy
32
620 - Engineering & allied operations
31
363 - Other social problems & services
22
900 - History & geography
21
610 - Medicine & health
20
000 - Computer science, information & general works
18
320 - Political science
18
370 - Education
18
380 - Commerce, communications & transportation
15
551 - Geology, hydrology & meteorology
11
140 - Specific philosophical schools
9
630 - Agriculture & related technologies
8
340 - Law
7
576 - Genetics & evolution
7
500 - Natural sciences & mathematics
6
580 - Plants (Botany)
6
100 - Philosophy & psychology
5
300 - Social sciences
5
400 - Language
4
658 - General management
4
200 - Religion
3
297 - Islam, Babism & Bahai Faith
2
304 - Factors affecting social behavior
2
338 - Production
2
581 - Specific topics in natural history
2
800 - Literature & rhetoric
2
170 - Ethics
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
398 - Folklore
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
530 - Physics
1
612 - Human physiology
1
780 - Music
1
791 - Public performances
1