Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
15
621 - Applied physics
11
384 - Communications; telecommunication
8
000 - Computer science, information & general works
5
600 - Technology
4
700 - The arts; fine & decorative arts
4
510 - Mathematics
3
520 - Astronomy & allied sciences
3
414 - Phonology & phonetics
2
530 - Physics
2
612 - Human physiology
2
900 - History & geography
2
003 - Systems
1
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
519 - Probabilities & applied mathematics
1
570 - Life sciences; biology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
658 - General management
1
745 - Decorative arts
1
780 - Music
1