Classification
005 - Computer programming, programs & data
324
330 - Economics
298
600 - Technology
285
620 - Engineering & allied operations
277
500 - Natural sciences & mathematics
237
006 - Special computer methods
228
621 - Applied physics
154
658 - General management
134
320 - Political science
122
004 - Data processing & computer science
115
610 - Medicine & health
102
629 - Other branches of engineering
90
820 - English & Old English literatures
85
900 - History & geography
75
630 - Agriculture & related technologies
70
000 - Computer science, information & general works
64
670 - Manufacturing
64
331 - Labor economics
61
340 - Law
59
300 - Social sciences
56
700 - The arts; fine & decorative arts
56
363 - Other social problems & services
54
333 - Economics of land & energy
52
616 - Diseases
46
519 - Probabilities & applied mathematics
38
370 - Education
35
745 - Decorative arts
32
664 - Food technology
31
380 - Commerce, communications & transportation
29
302 - Social interaction
28
530 - Physics
27
624 - Civil engineering
26
641 - Food & drink
25
140 - Specific philosophical schools
22
338 - Production
22
520 - Astronomy & allied sciences
22
001 - Knowledge
21
510 - Mathematics
21
003 - Systems
19
576 - Genetics & evolution
19
650 - Management & auxiliary services
18
384 - Communications; telecommunication
17
551 - Geology, hydrology & meteorology
16
304 - Factors affecting social behavior
15
690 - Buildings
15
332 - Financial economics
14
360 - Social problems & services; associations
14
400 - Language
14
570 - Life sciences; biology
14
580 - Plants (Botany)
14
more ...