Classification
600 - Technology
8,355
629 - Other branches of engineering
1,919
004 - Data processing & computer science
980
621 - Applied physics
532
006 - Special computer methods
528
620 - Engineering & allied operations
432
003 - Systems
382
658 - General management
250
700 - The arts; fine & decorative arts
188
670 - Manufacturing
149
610 - Medicine & health
132
140 - Specific philosophical schools
128
900 - History & geography
128
000 - Computer science, information & general works
105
005 - Computer programming, programs & data
98
333 - Economics of land & energy
87
330 - Economics
65
500 - Natural sciences & mathematics
65
745 - Decorative arts
64
380 - Commerce, communications & transportation
62
790 - Recreational & performing arts
57
363 - Other social problems & services
55
519 - Probabilities & applied mathematics
44
576 - Genetics & evolution
35
331 - Labor economics
34
630 - Agriculture & related technologies
34
340 - Law
33
580 - Plants (Botany)
31
370 - Education
29
720 - Architecture
28
515 - Analysis
26
660 - Chemical engineering
23
320 - Political science
22
400 - Language
21
100 - Philosophy & psychology
20
530 - Physics
18
300 - Social sciences
16
170 - Ethics
14
543 - Analytical chemistry
11
612 - Human physiology
11
650 - Management & auxiliary services
11
338 - Production
10
518 - Numerical analysis
9
531 - Classical mechanics; solid mechanics
9
800 - Literature & rhetoric
9
410 - Linguistics
8
414 - Phonology & phonetics
8
591 - Specific topics in natural history
8
200 - Religion
7
690 - Buildings
7
more ...