Classification
333 - Economics of land & energy
658 - General management
330 - Economics
81
700 - The arts; fine & decorative arts
54
000 - Computer science, information & general works
50
600 - Technology
49
363 - Other social problems & services
42
610 - Medicine & health
37
380 - Commerce, communications & transportation
31
620 - Engineering & allied operations
26
140 - Specific philosophical schools
21
320 - Political science
21
580 - Plants (Botany)
21
900 - History & geography
19
576 - Genetics & evolution
16
551 - Geology, hydrology & meteorology
14
630 - Agriculture & related technologies
14
370 - Education
13
500 - Natural sciences & mathematics
9
800 - Literature & rhetoric
7
530 - Physics
6
581 - Specific topics in natural history
6
304 - Factors affecting social behavior
5
720 - Architecture
5
170 - Ethics
4
340 - Law
4
400 - Language
4
100 - Philosophy & psychology
3
300 - Social sciences
3
361 - Social problems & social welfare in general
3
381 - Commerce
3
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
2
338 - Production
2
410 - Linguistics
2
540 - Chemistry & allied sciences
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
331 - Labor economics
1
364 - Criminology
1
368 - Insurance
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
657 - Accounting
1
670 - Manufacturing
1
770 - Photography, photographs & computer art
1