The End-of-Text character (ETX) is a control character used to inform the receiving computer that the end of a record has been reached.
All this use is pretty much obsolete, except in modem communication (AT command set).
Control-C is often used to interrupt a program or process, a standard that started with Dec operating systems.
[citation needed] In TOPS-20, it was used to gain the system's attention before logging in.
mIRC uses ETX as the escape character to start a command to set the color.