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| 服务数据装置 | |||
| 服务数据单元; 业务数据单元 | |||
| 服务数据块 | |||
| 服务数据单兀; 服务数据单元业务数据单位 | |||
| English thesaurus | |||
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| SDU (OSI) | |||
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Service Data Unit : 49 phrases in 10 subjects |
| Agriculture | 1 |
| Artificial intelligence | 1 |
| Aviation | 3 |
| Electronics | 24 |
| Exhibitions | 1 |
| Geophysics | 1 |
| Information technology | 5 |
| Multimedia | 1 |
| Space | 5 |
| Telecommunications | 7 |