Classification
530 - Physics
34
500 - Natural sciences & mathematics
7
520 - Astronomy & allied sciences
3
620 - Engineering & allied operations
3
301 - Sociology & anthropology
2
621 - Applied physics
2
004 - Data processing & computer science
1
006 - Special computer methods
1
305 - Social groups
1
306 - Culture & institutions
1
330 - Economics
1
378 - Higher education
1
511 - General principles of mathematics
1
535 - Light & infrared & ultraviolet phenomena
1
576 - Genetics & evolution
1
658 - General management
1