| Subject | English | Thesaurus |
| abbr., comp., net. | Common Part Convergence Sublayer-Service Data Unit | CPCS-SDU |
| IT, abbr. | Transport Protocol Data Unit | TPDU (OSI, OSI/RM, PDU, ICC) |
| telecom., abbr. | Transport Protocol Data Unit | TPDU |
| IT, abbr. | Transport Service Data Unit | TSDU (OSI, OSI/RM) |
| telecom., abbr. | Transport Service Data Unit | TSDU |