 |
| English thesaurus | |||
| |||
| PADS (Slate Corporation) | |||
|
Pen : 449 phrases in 51 subjects |
| Agriculture | 51 |
| American usage, not spelling | 1 |
| Archaeology | 2 |
| Automated equipment | 6 |
| Biology | 1 |
| British usage, not spelling | 2 |
| Business | 2 |
| Chemistry | 1 |
| Commerce | 1 |
| Communications | 3 |
| Computers | 21 |
| Construction | 17 |
| Cultural studies | 1 |
| Earth sciences | 1 |
| Education | 3 |
| Electronics | 1 |
| English | 1 |
| General | 114 |
| Health care | 4 |
| Hobbies and pastimes | 1 |
| Immigration and citizenship | 1 |
| Industry | 14 |
| Informal | 2 |
| Information technology | 12 |
| Life sciences | 3 |
| Mammals | 4 |
| Measuring instruments | 8 |
| Medical | 2 |
| Medical appliances | 1 |
| Metallurgy | 2 |
| Microelectronics | 2 |
| Microsoft | 4 |
| Military | 1 |
| Municipal planning | 1 |
| Nuclear physics | 5 |
| Obsolete / dated | 2 |
| Optics branch of physics | 31 |
| Patents | 2 |
| Pharmacy and pharmacology | 1 |
| Physics | 4 |
| Polygraphy | 8 |
| Radiation | 21 |
| Refrigeration | 1 |
| Scientific | 1 |
| Social science | 1 |
| Sound recording | 2 |
| Technology | 42 |
| Telecommunications | 1 |
| Transport | 6 |
| Zoology | 3 |
| Zootechnics | 27 |