| English thesaurus | |||
| |||
| Heaviside function (ssn) | |||
|
threshold : 133 phrases in 29 subjects |
| Acridology | 8 |
| Antennas and waveguides | 4 |
| Commerce | 1 |
| Corporate governance | 3 |
| Ecology | 1 |
| Economics | 15 |
| Electronics | 10 |
| Environment | 6 |
| Fishery fishing industry | 1 |
| Food industry | 2 |
| Horticulture | 1 |
| International Monetary Fund | 11 |
| Isolation | 10 |
| Lighting other than cinema | 9 |
| Magnetics | 2 |
| Mathematics | 3 |
| Medical | 5 |
| Microsoft | 8 |
| Power electronics | 1 |
| Radio | 3 |
| Radiobiology | 12 |
| Radiology | 3 |
| Remote sensing | 2 |
| Semiconductors | 1 |
| Soil science | 1 |
| Statistics | 3 |
| United Nations | 1 |
| Vacuum tubes | 5 |
| Virology | 1 |