Classification
006 - Special computer methods
1,990
330 - Economics
1,247
005 - Computer programming, programs & data
873
320 - Political science
575
000 - Computer science, information & general works
385
658 - General management
328
004 - Data processing & computer science
254
700 - The arts; fine & decorative arts
245
620 - Engineering & allied operations
237
600 - Technology
232
500 - Natural sciences & mathematics
213
340 - Law
212
900 - History & geography
175
333 - Economics of land & energy
157
025 - Library operations
155
363 - Other social problems & services
154
519 - Probabilities & applied mathematics
145
610 - Medicine & health
138
621 - Applied physics
113
570 - Life sciences; biology
87
300 - Social sciences
82
576 - Genetics & evolution
62
001 - Knowledge
61
380 - Commerce, communications & transportation
60
003 - Systems
59
302 - Social interaction
52
745 - Decorative arts
51
140 - Specific philosophical schools
48
331 - Labor economics
46
550 - Earth sciences
45
381 - Commerce
42
518 - Numerical analysis
41
040 - [Unassigned]
40
551 - Geology, hydrology & meteorology
39
510 - Mathematics
37
540 - Chemistry & allied sciences
37
580 - Plants (Botany)
37
370 - Education
33
338 - Production
30
400 - Language
27
622 - Mining & related operations
27
670 - Manufacturing
27
630 - Agriculture & related technologies
25
581 - Specific topics in natural history
24
720 - Architecture
24
301 - Sociology & anthropology
22
153 - Mental processes & intelligence
21
820 - English & Old English literatures
21
530 - Physics
20
800 - Literature & rhetoric
17
more ...