Classification
510 - Mathematics
620 - Engineering & allied operations
7
515 - Analysis
4
003 - Systems
2
511 - General principles of mathematics
2
519 - Probabilities & applied mathematics
2
005 - Computer programming, programs & data
1
330 - Economics
1
384 - Communications; telecommunication
1
500 - Natural sciences & mathematics
1
514 - Topology
1
629 - Other branches of engineering
1
681 - Precision instruments & other devices
1