Classification
541 - Physical chemistry
36
540 - Chemistry & allied sciences
12
530 - Physics
9
543 - Analytical chemistry
9
547 - Organic chemistry
9
333 - Economics of land & energy
7
620 - Engineering & allied operations
7
000 - Computer science, information & general works
6
600 - Technology
6
539 - Modern physics
4
610 - Medicine & health
4
621 - Applied physics
4
546 - Inorganic chemistry
3
571 - Physiology & related subjects
3
616 - Diseases
3
700 - The arts; fine & decorative arts
3
004 - Data processing & computer science
2
005 - Computer programming, programs & data
2
363 - Other social problems & services
2
570 - Life sciences; biology
2
660 - Chemical engineering
2
001 - Knowledge
1
003 - Systems
1
006 - Special computer methods
1
140 - Specific philosophical schools
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
518 - Numerical analysis
1
536 - Heat
1
542 - Techniques, equipment & materials
1
572 - Biochemistry
1
630 - Agriculture & related technologies
1