Classification
620 - Engineering & allied operations
600 - Technology
193
900 - History & geography
149
700 - The arts; fine & decorative arts
140
333 - Economics of land & energy
81
540 - Chemistry & allied sciences
45
000 - Computer science, information & general works
34
363 - Other social problems & services
34
610 - Medicine & health
34
580 - Plants (Botany)
32
330 - Economics
25
380 - Commerce, communications & transportation
25
414 - Phonology & phonetics
23
530 - Physics
16
140 - Specific philosophical schools
14
576 - Genetics & evolution
11
720 - Architecture
10
500 - Natural sciences & mathematics
9
677 - Textiles
9
340 - Law
7
658 - General management
6
667 - Cleaning, color & coating technologies
5
304 - Factors affecting social behavior
4
621 - Applied physics
4
668 - Technology of other organic products
4
800 - Literature & rhetoric
4
370 - Education
3
612 - Human physiology
3
745 - Decorative arts
3
381 - Commerce
2
615 - Pharmacology & therapeutics
2
630 - Agriculture & related technologies
2
170 - Ethics
1
320 - Political science
1
338 - Production
1
547 - Organic chemistry
1
622 - Mining & related operations
1
650 - Management & auxiliary services
1
657 - Accounting
1
664 - Food technology
1
681 - Precision instruments & other devices
1
688 - Other final products & packaging
1