| Subject | English | German |
| commun. | frame relay service | Rahmenrelais |
| comp., MS | Microsoft CRM Mobile HTTP Relay Service | HTTP-Relaydienst für Microsoft CRM Mobile (A service that is installed and started on the Microsoft CRM server that relays device-initiated Web requests to a Web service running in the intranet) |
| commun. | radio-relay system service channel | Richtfunkdienststrecke |
| earth.sc., el. | service relay | Arbeitsrelais |