Classification
500 - Natural sciences & mathematics
510 - Mathematics
22
004 - Data processing & computer science
6
620 - Engineering & allied operations
5
000 - Computer science, information & general works
4
006 - Special computer methods
4
302 - Social interaction
2
511 - General principles of mathematics
2
519 - Probabilities & applied mathematics
2
770 - Photography, photographs & computer art
2
003 - Systems
1
005 - Computer programming, programs & data
1
331 - Labor economics
1
520 - Astronomy & allied sciences
1
530 - Physics
1