Classification
500 - Natural sciences & mathematics
005 - Computer programming, programs & data
39
620 - Engineering & allied operations
19
331 - Labor economics
14
004 - Data processing & computer science
13
658 - General management
12
006 - Special computer methods
11
330 - Economics
8
302 - Social interaction
7
300 - Social sciences
6
670 - Manufacturing
6
745 - Decorative arts
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
4
384 - Communications; telecommunication
4
700 - The arts; fine & decorative arts
4
600 - Technology
3
610 - Medicine & health
3
155 - Differential & developmental psychology
2
381 - Commerce
2
520 - Astronomy & allied sciences
2
547 - Organic chemistry
2
621 - Applied physics
2
660 - Chemical engineering
2
770 - Photography, photographs & computer art
2
900 - History & geography
2
001 - Knowledge
1
011 - Bibliographies
1
025 - Library operations
1
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
338 - Production
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
364 - Criminology
1
370 - Education
1
510 - Mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
577 - Ecology
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
686 - Printing & related activities
1
741 - Drawing & drawings
1
781 - General principles & musical forms
1
910 - Geography & travel
1