| Subject | English | Portuguese |
| comp., MS, Braz. | control message | mensagem de controle (An application-readable message requesting the execution of a specific operation on the client side) |
| commun., comp. | Internet Control Message Protocol | protocolo de mensagens de controlo da Internet |
| comp., MS | Internet Control Message Protocol A required maintenance protocol in the TCP/IP suite that reports errors and allows simple connectivity. ICMP is used by the Ping tool to perform TCP/IP troubleshooting | protocolo ICMP (Internet Control Message Protocol) |
| commun. | power control message | mensagem de nível de controlo de potência |
| el. | safety and control message | comunicação de segurança e controlo |