Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
380 - Commerce, communications & transportation
6
700 - The arts; fine & decorative arts
5
720 - Architecture
5
140 - Specific philosophical schools
4
600 - Technology
4
621 - Applied physics
4
745 - Decorative arts
4
900 - History & geography
4
320 - Political science
3
340 - Law
3
363 - Other social problems & services
3
576 - Genetics & evolution
3
000 - Computer science, information & general works
2
384 - Communications; telecommunication
2
400 - Language
2
004 - Data processing & computer science
1
005 - Computer programming, programs & data
1
331 - Labor economics
1
333 - Economics of land & energy
1
338 - Production
1
410 - Linguistics
1
510 - Mathematics
1
610 - Medicine & health
1
658 - General management
1