Classification
900 - History & geography
620 - Engineering & allied operations
1,712
600 - Technology
1,692
700 - The arts; fine & decorative arts
832
333 - Economics of land & energy
652
363 - Other social problems & services
338
380 - Commerce, communications & transportation
281
330 - Economics
261
000 - Computer science, information & general works
258
610 - Medicine & health
186
580 - Plants (Botany)
170
140 - Specific philosophical schools
132
576 - Genetics & evolution
124
320 - Political science
87
500 - Natural sciences & mathematics
82
720 - Architecture
82
551 - Geology, hydrology & meteorology
79
630 - Agriculture & related technologies
75
340 - Law
74
414 - Phonology & phonetics
62
370 - Education
55
800 - Literature & rhetoric
52
540 - Chemistry & allied sciences
45
658 - General management
38
530 - Physics
35
300 - Social sciences
31
400 - Language
31
581 - Specific topics in natural history
27
100 - Philosophy & psychology
25
304 - Factors affecting social behavior
23
410 - Linguistics
14
780 - Music
12
770 - Photography, photographs & computer art
10
170 - Ethics
9
550 - Earth sciences
7
612 - Human physiology
7
200 - Religion
5
361 - Social problems & social welfare in general
5
657 - Accounting
5
301 - Sociology & anthropology
4
120 - Epistemology, causation & humankind
3
615 - Pharmacology & therapeutics
3
160 - Logic
2
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
364 - Criminology
1
650 - Management & auxiliary services
1
791 - Public performances
1