footprint: 38 phrases in 13 subjects |
Chemistry | 2 |
Communications | 8 |
Cultural studies | 2 |
Earth sciences | 1 |
Economy | 1 |
Electronics | 4 |
Environment | 9 |
General | 1 |
Microelectronics | 1 |
Mineral products | 2 |
Satellite communications | 1 |
Technology | 2 |
Transport | 4 |