Classification
658 - General management
330 - Economics
15
333 - Economics of land & energy
9
600 - Technology
6
000 - Computer science, information & general works
5
363 - Other social problems & services
5
700 - The arts; fine & decorative arts
5
650 - Management & auxiliary services
4
380 - Commerce, communications & transportation
3
381 - Commerce
3
580 - Plants (Botany)
3
610 - Medicine & health
3
300 - Social sciences
2
302 - Social interaction
2
303 - Social processes
2
320 - Political science
2
338 - Production
2
384 - Communications; telecommunication
2
500 - Natural sciences & mathematics
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
670 - Manufacturing
2
800 - Literature & rhetoric
2
900 - History & geography
2
001 - Knowledge
1
005 - Computer programming, programs & data
1
140 - Specific philosophical schools
1
331 - Labor economics
1
332 - Financial economics
1
340 - Law
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
620 - Engineering & allied operations
1
647 - Management of public households
1
740 - Drawing & decorative arts
1
741 - Drawing & drawings
1
745 - Decorative arts
1