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| English thesaurus | |||
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| Optio Software | |||
| opto electronics | |||
| One Person Train Operation | |||
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| optoelectronics | |||
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OPTO : 46 phrases in 14 subjects |
| Agriculture | 1 |
| Business | 3 |
| Electronics | 4 |
| General | 3 |
| Information technology | 4 |
| Measuring instruments | 1 |
| Medical | 2 |
| Medical appliances | 14 |
| Microelectronics | 2 |
| Nuclear physics | 1 |
| Optics branch of physics | 7 |
| Physics | 2 |
| Technology | 1 |
| Telecommunications | 1 |