| Subject | English | Thesaurus |
| abbr., comp., net. | Common Part Convergence Sublayer-Service Data Unit | CPCS-SDU |
| comp., abbr. | Data Facility Data Set Services | DFDSS |
| mil., abbr. | Data Facility Dataset Services | DFDS |
| avia. | data link-automatic terminal information service | The provision of ATIS via data link. |
| comp., net., abbr. | Data Stream Proxy Service | DSPS |
| abbr., comp., net. | Transport Protocol for Data services | TPD |
| IT, abbr. | Transport Service Data Unit | TSDU (OSI, OSI/RM) |
| telecom., abbr. | Transport Service Data Unit | TSDU |