Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
57
745 - Decorative arts
50
621 - Applied physics
19
331 - Labor economics
15
600 - Technology
15
004 - Data processing & computer science
14
330 - Economics
14
900 - History & geography
14
384 - Communications; telecommunication
13
333 - Economics of land & energy
11
658 - General management
11
720 - Architecture
11
000 - Computer science, information & general works
10
700 - The arts; fine & decorative arts
10
300 - Social sciences
8
338 - Production
7
363 - Other social problems & services
7
629 - Other branches of engineering
7
140 - Specific philosophical schools
6
540 - Chemistry & allied sciences
6
590 - Animals (Zoology)
6
100 - Philosophy & psychology
5
302 - Social interaction
5
380 - Commerce, communications & transportation
5
610 - Medicine & health
5
670 - Manufacturing
5
790 - Recreational & performing arts
5
370 - Education
3
006 - Special computer methods
2
364 - Criminology
2
530 - Physics
2
576 - Genetics & evolution
2
657 - Accounting
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
307 - Communities
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
510 - Mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
623 - Military & nautical engineering
1
635 - Garden crops (Horticulture)
1
660 - Chemical engineering
1
681 - Precision instruments & other devices
1
727 - Buildings for education & research
1