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propagation : 316 phrases in 21 subjects |
| Agriculture | 2 |
| Chemistry | 3 |
| Coal | 1 |
| Communications | 54 |
| Earth sciences | 24 |
| Electronics | 151 |
| Environment | 6 |
| Finances | 2 |
| General | 4 |
| Health care | 6 |
| Information technology | 20 |
| Law | 1 |
| Life sciences | 13 |
| Materials science | 6 |
| Medical | 8 |
| Metallurgy | 3 |
| Microsoft | 3 |
| Natural sciences | 1 |
| Physical sciences | 3 |
| Scientific | 3 |
| Transport | 2 |