| Subject | English | Portuguese |
| comp., MS, Braz. | synchronous data exchange | troca de dados síncrona (A style of processing where an application requests that an event occurs and waits for the event to complete, so that the application is certain of the result of its request before it proceeds) |
| commun. | synchronous data link control | controlo de ligação de dados síncrono |
| comp., MS, Braz. | synchronous data link control | protocolo SDLC (A type of link service used for managing synchronous data transfer over standard telephone lines (switched lines) or leased lines. The data transmission protocol most widely used by networks conforming to IBM's Systems Network Architecture (SNA). SDLC is similar to the HDLC (High-level Data Link Control) protocol developed by the International Organization for Standardization (ISO)) |
| commun. | synchronous data network | rede síncrona de dados |
| commun. | synchronous data stream | sequência síncrona de dados |
| commun. | synchronous data string | sequência síncrona de dados |
| telegr. | synchronous data transmission | transmissão síncrona de dados |